Kristiyan Vladov

#014 – Animal Cell 🐾🔬
Every animal — from a tiny sponge to a blue whale — is built from animal cells.
Animal cells are eukaryotic, meaning their DNA is mainly enclosed inside a membrane-bound nucleus. Around it operates an incredibly organized network of structures, each performing specialized tasks.
🔹 A microscopic biological factory
🧬 Nucleus — stores genetic information
⚡ Mitochondria — generate most cellular ATP
🏭 Ribosomes & rough ER — produce proteins
📦 Golgi apparatus — modifies, sorts and transports cellular products
♻️ Lysosomes — break down and recycle cellular material
🕸️ Cytoskeleton — provides organization, movement and intracellular transport
🔹 Different from plant cells 🌱
Animal cells lack cell walls and chloroplasts. Their flexible plasma membrane allows cells to develop an enormous variety of shapes.
🔹 Specialization changed everything
Neurons transmit signals. Muscle cells contract. Epithelial cells create protective barriers. Immune cells defend the organism.
Different cells — the same basic cellular architecture — working together to build tissues, organs and entire animals.
💡 Fun fact: Mature mammalian red blood cells are unusual animal cells because they lose their nucleus and most organelles, creating more room for hemoglobin and oxygen transport.
📚 Taxonomy: Catalogue of Life (CoL26.7 XR, 2026)
📖 Biological information: Campbell Biology, 12th Edition
👉 Next: #015 – Plant Cell 🌿🔬
#DeepRoots #AnimalCell #CellBiology #Cells #Eukaryotes #Mitochondria #Nucleus #Biology #MicroscopicLife #Science #ScienceEducation #Evolution #KristiyanVladov

1 week ago | [YT] | 3

Kristiyan Vladov

#013 – Eukaryotic Cell 🔬🧬
A major step in the history of life was the evolution of the eukaryotic cell — a cell built around internal compartments.
Unlike bacteria and archaea, eukaryotic cells contain their genetic material inside a membrane-bound nucleus. They also possess specialized structures called organelles, allowing different cellular processes to occur in dedicated compartments.
🔹 A cell divided into specialized spaces
The nucleus stores most of the cell's DNA.
Mitochondria generate much of the cell's usable energy.
The endoplasmic reticulum and Golgi apparatus manufacture, modify and transport molecules.
Lysosomes and peroxisomes perform specialized metabolic and recycling functions.
🔹 One design — incredible diversity 🌍
Eukaryotic cells form animals, plants, fungi, chromists and protozoans. Some eukaryotes consist of a single cell, while others — including humans and giant trees — are complex multicellular organisms.
🔹 An ancient partnership
Mitochondria originated from bacteria that entered into an ancient symbiotic relationship with another cell. Chloroplasts later arose through a similar process involving cyanobacteria. This is known as endosymbiosis.
💡 Fun fact: Mitochondria and chloroplasts still contain their own DNA, one of several major lines of evidence supporting their bacterial ancestry.
📚 Taxonomy: Catalogue of Life (CoL26.7 XR, 2026)
📖 Biological information: Campbell Biology, 12th Edition
👉 Next: #014 – Animal Cell 🐾🔬
#DeepRoots #EukaryoticCell #CellBiology #Eukaryotes #Cells #Mitochondria #Nucleus #Endosymbiosis #Evolution #Biology #Science #MicroscopicLife #ScienceEducation #KristiyanVladov

1 week ago | [YT] | 2

Kristiyan Vladov

#012 – Archaeal Cell 🧬🔬
At first glance, an archaeal cell may look similar to a bacterial cell. But at the molecular level, Archaea are remarkably different.
Like bacteria, archaea are prokaryotes — they have no membrane-bound nucleus, and their DNA occupies a nucleoid region. But their cellular chemistry tells a very different evolutionary story.
🔹 A unique membrane
Archaeal membranes contain ether-linked lipids, unlike the ester-linked lipids typical of bacteria and eukaryotes. In some archaea, these lipids can even form a highly stable membrane monolayer.
🔹 No peptidoglycan
Archaeal cell walls do not contain bacterial peptidoglycan. Depending on the species, the surface may instead contain an S-layer, other polymers, or pseudomurein in some groups.
🔹 Masters of unusual environments 🌋
Some archaea thrive in hot springs, hypersaline lakes, acidic environments, or oxygen-free habitats. But archaea are not limited to extreme environments — they are also abundant in oceans, soils, sediments, and the microbiomes of other organisms.
🔹 Methane makers
Methanogenesis — biological methane production — is found exclusively among Archaea. Methanogens are important members of anaerobic ecosystems and global carbon cycling.
💡 Fun fact: Although archaea resemble bacteria in overall cell structure, parts of their genetic-information machinery share important similarities with eukaryotes.
📚 Taxonomy: Catalogue of Life (CoL26.7 XR, 2026)
📖 Biological information: Brock Biology of Microorganisms
👉 Next: #013 – Eukaryotic Cell
#DeepRoots #Archaea #ArchaealCell #Microbiology #CellBiology #Prokaryotes #Extremophiles #Methanogens #Evolution #Biology #Science #ScienceEducation #KristiyanVladov

1 week ago | [YT] | 1

Kristiyan Vladov

#011 – Bacterial Cell 🦠🔬
Small, simple in structure — but incredibly powerful.
A bacterial cell is a prokaryotic cell, meaning it has no membrane-bound nucleus. Instead, its DNA is concentrated in a region called the nucleoid.
🔹 Inside a bacterial cell
The cytoplasm contains ribosomes, where proteins are produced. A plasma membrane controls what enters and leaves the cell, while most bacteria also possess a cell wall containing peptidoglycan.
🔹 Built for survival
Depending on the species, bacteria may have flagella for movement, pili or fimbriae for attachment and other functions, or an external capsule that can provide protection.
🔹 Tiny cells, planetary impact 🌍
Bacteria recycle nutrients, decompose organic matter, participate in nitrogen fixation, live in symbiosis with other organisms, and form the foundations of countless ecosystems.
💡 Fun fact: Bacteria can exchange genetic material through horizontal gene transfer, allowing useful genes to spread between cells without traditional reproduction.
📚 Taxonomy: Catalogue of Life (CoL26.7 XR, 2026)
📖 Biological information: Brock Biology of Microorganisms
👉 Next: #012 – Archaeal Cell
#DeepRoots #BacterialCell #Bacteria #Microbiology #CellBiology #Prokaryotes #MicroscopicLife #Biology #Science #DNA #Evolution #ScienceEducation #KristiyanVladov

1 week ago | [YT] | 2

Kristiyan Vladov

#010 – Kingdom Protozoa 🦠
A hidden universe exists all around us — and much of it consists of just one cell.
Protozoa, as recognized in the classification used by the Catalogue of Life, includes diverse eukaryotic organisms. Many are microscopic and unicellular, yet a single cell can perform everything needed for life: feeding, movement, sensing the environment, reproduction, and survival.
Some move using cilia, flagella, or pseudopodia. Some are predators, others photosynthetic or mixotrophic, and some live as parasites or in symbiosis with other organisms.
Despite their tiny size, these organisms can play enormous ecological roles — recycling nutrients, feeding aquatic food webs, and influencing entire ecosystems.
💡 Fun fact: A single Paramecium is one cell, but it can swim, detect its surroundings, capture food, digest it, remove waste, and reproduce. No organs required!
📚 Taxonomy: Catalogue of Life (CoL26.7 XR, 2026)
📖 Biological information: Campbell Biology, 12th Edition
👉 Next: Module II — Cell Biology
🔬 #011 Bacterial Cell
#DeepRoots #Protozoa #KingdomProtozoa #Protists #Microbiology #CellBiology #MicroscopicLife #Evolution #Biodiversity #Biology #Science #CatalogueOfLife #KristiyanVladov

1 week ago | [YT] | 2

Kristiyan Vladov

🩸 Not All Blood Is Red!
When we think of blood, we usually imagine red—but evolution has created some incredible alternatives.
🐙 Octopuses — Blue
Their blood uses hemocyanin, a copper-containing respiratory pigment that appears blue when oxygenated.
🦎 Green-blooded skinks — Green
Species of Prasinohaema accumulate extremely high concentrations of biliverdin, giving their blood its extraordinary green color.
🪱 Peanut worms — Violet/Pink
Some use hemerythrin to transport oxygen, producing violet to pinkish-purple tones when oxygenated.
🪱 Some annelid worms — Greenish
Their respiratory pigment chlorocruorin is related to hemoglobin but can give dilute blood a green appearance.
🐟 Antarctic icefish — Nearly colorless
Icefishes of the family Channichthyidae famously lack functional hemoglobin as adults. Oxygen is instead carried largely dissolved directly in their blood plasma.
💡 Evolution doesn't always use the same solution. Different environments have produced remarkably different ways of transporting oxygen around the body.
#DeepRoots #Blood #Evolution #Biology #MarineBiology #Octopus #Icefish #Antarctica #Hemocyanin #Hemerythrin #Science #Nature #KristiyanVladov

1 week ago | [YT] | 2

Kristiyan Vladov

🟤 #009 – Kingdom Chromista – The Hidden Engineers of Aquatic Life
Chromista is a diverse kingdom of eukaryotes that includes diatoms, brown algae, and oomycetes. Many species perform photosynthesis and are among the most important primary producers in oceans and freshwater ecosystems.
Diatoms alone generate a significant share of the Earth's oxygen and form the base of countless aquatic food webs.
💡 Fun fact: The intricate silica shells of diatoms are so beautiful and complex that they are often studied under electron microscopes.
📚 Taxonomy: Catalogue of Life (CoL26.7 XR, 2026)
📖 Biological information: Algae (Graham, Graham & Wilcox)
Hashtags:
#DeepRoots #KingdomChromista #Chromista #Diatoms #MarineBiology #Biology #Science #Evolution #CatalogueOfLife #KristiyanVladov

2 weeks ago | [YT] | 2

Kristiyan Vladov

🍄 #008 – Kingdom Fungi – Nature's Greatest Recyclers
Fungi are eukaryotic organisms that absorb nutrients from their surroundings instead of producing their own food. From mushrooms and molds to microscopic yeasts, they play a vital role in breaking down organic matter and recycling nutrients back into ecosystems.
Many fungi form symbiotic relationships with plants, while others are essential for food production, medicine, and biotechnology.
💡 Fun fact: The largest known organism on Earth is a fungus—Armillaria ostoyae—covering nearly 9 km² in Oregon, USA.
📚 Taxonomy: Catalogue of Life (CoL26.7 XR, 2026)
📖 Biological information: Campbell Biology (12th Edition)
Hashtags:
#DeepRoots #KingdomFungi #Fungi #Mycology #Biology #Science #Evolution #Nature #CatalogueOfLife #KristiyanVladov

2 weeks ago | [YT] | 4

Kristiyan Vladov

🌱 #007 – Kingdom Plantae – The Green Foundation of Life
Plants are multicellular, photosynthetic eukaryotes that capture sunlight and convert it into chemical energy through photosynthesis. They produce oxygen, provide food, regulate Earth's climate, and form the foundation of nearly every terrestrial ecosystem.
From tiny mosses to giant sequoias, plants have evolved remarkable adaptations that allow them to thrive in almost every environment on our planet.
💡 Fun fact: More than half of the oxygen we breathe is produced by photosynthetic organisms, including plants and microscopic algae.
📚 Taxonomy: Catalogue of Life (CoL26.7 XR, 2026)
📖 Biological information: Raven Biology of Plants (9th Edition)
Hashtags:
#DeepRoots #KingdomPlantae #Plantae #Botany #Photosynthesis #Biology #Science #Evolution #CatalogueOfLife #KristiyanVladov

2 weeks ago | [YT] | 3

Kristiyan Vladov

Happy birthday, Michael Jackson! 👑🎂

Greetings from Salvador, Brazil—the place where Michael filmed the legendary music video for “They Don’t Care About Us” with Olodum. 🇧🇷🥁

Decades later, his music still echoes through these streets, and his powerful message lives on. One king. One legend. An eternal legacy.

#happybirthdaymichaeljackson #michaeljackson #kingofpop #mj #mjforever #michaeljacksonforever #theydontcareaboutus #salvador #salvadordabahia #bahia #brazil #pelourinho #olodum #brazilianmusic #musiclegend #popmusic #legend #icon #moonwalker #mjfans #michaeljacksonfans #musicvideo #90smusic #birthdaytribute #eternallegacy #healtheworld #history #travel #travelbrazil #visitbrazil

2 weeks ago | [YT] | 4