Kalpana Rajput

@kalpanarajput.bsky.social

Day 3 — Kingdom Protista! The kingdom of misfits! 🤔 ✅ Has true nucleus (Eukaryotic) ✅ Mostly unicellular ✅ Lives in water 💧 3 Main Types: 🌿 Plant like — Algae, Diatoms 🐾 Animal like — Amoeba, Paramecium 🍄 Fungi like — Slime moulds Fun fact: Amoeba has no fixed shape — changes every second!

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Day 2 - Kingdom Monera! Earth's oldest & smallest life forms No true nucleus (Prokaryotic) No membrane bound organelles Unicellular only 2 Main Types: Archaebacteria - extreme environments Eubacteria -common bacteria Found everywhere: Hot springs Arctic ice Salt lakes

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New Series — Biological Classification! 5 Kingdoms that organize ALL life on Earth 🧬 👑 MONERA — bacteria, no nucleus 🦠 PROTISTA— single celled, has nucleus 🍄 FUNGI— decomposers, absorb food 🌿 PLANTAE— make their own food 🐾 ANIMALIA — consume food, most complex Given by WHITTAKER (1969)

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Day 5 of tissue series - Muscle Tissue! The body's movement engine Contracts & relaxes Generates force Produces heat 3 Types: Cardiac - heart only, involuntary Skeletal -moves bones, voluntary Smooth - organs & vessels, involuntary Fun fact: Heart never rests - beats 100,000 times a day!


Cardiac Muscle:

 Found exclusively in the heart. It is characterized by branched fibers and striations, functioning involuntarily to pump blood.

Skeletal Muscle: 

Attached to bones via tendons. These fibers are long, cylindrical, and striated, allowing for voluntary body movements.

Smooth Muscle:

 Located in the walls of hollow organs like the intestines and blood vessels. These spindle-shaped cells lack striations and operate involuntarily.

Day 4 of tissue series - Nervous Tissue! The Receives signals Processes informationControls everything Two main cells: Neurons - signal transmitters, Neuroglia - support & protect neurons Parts of Neuron: Dendrites - receive signals Axon - sends signals Myelin sheath - speeds transmission

NEURON: 

The neuron is the functional unit of the nervous system, responsible for transmitting electrical signals. Its main parts include:

CELL BODY :-

 The central part containing the Nucleus, which acts as the cell's control center.

DENDRITES:

 Branch-like structures that receive incoming signals from other neurons.

AXON: 

A long, thin projection that carries nerve impulses away from the cell body toward contacts with other cells.NUROGELIA : 

(Supporting Cells)Neuroglia (or glial cells) are the "supporting cast" for neurons. While they do not conduct electrical impulses themselves, they are essential for:Providing structural support.Supplying nutrients and oxygen to neurons.Insulating axons (myelin sheath).Removing dead neurons and pathogens.

Day 3 of tissue series - Connective Tissue! The body's ultimate support system Binds organs together Stores energy- fat Fights infection Transports oxygen Includes: Bone -rigid support Blood -liquid connective tissue Adipose -fat storage Cartilage-flexible cushio Blood is a connective tissue!

Presence of connective tissue Types of CONNECTIVE TISSUE 💪Parts of CONNECTIVE TISSUE 💪

Just dove deep into tissue biology today & wow,the human body is genuinely mind-blowing. 4 types run the entire human body: 🧱 Epithelial-covers & protects 💪 Connective-supports & binds ⚡ Nervous-transmits signals 🫀 Muscle-contracts & moves Every organ=just a combo of these 4. #MedStudent #Histology

Histological section of testicular tissue viewed with dark field illumination
Source:https://commons.wikimedia.org/wiki/File:Corte_histol%C3%B3gico_de_tejido_testicular_visto_con_campo_oscuro.jpgDiffuse consolidation of unfixed lung.
Source:Diffuse alveolar damage (DAD)Representation of 4 basic types of tissue: connective tissue, epithelial tissue, muscle tissue, and nervous tissue.
Source:https://medlineplus.gov/ency/imagepages/8682.htm