Скачать или смотреть Part 01 Cell (कोशिका) 😱 | basic information of cell | Biology by SDL Sir

This video provides an introduction to the topic of cells (कोशिका), explaining their basic structure, discovery, and types (0:00).

Here's a breakdown of the key points:

Definition of Cell (2:51): The cell is the smallest unit of our body, not visible to the naked eye, requiring a microscope for observation. All organisms are made of cells.
Etymology and Study of Cells:
The term "cell" is derived from the Latin word Cellula, meaning "small room" (0:47).
The study of cells is called Cytology (1:03).
Discovery of Cells:
Robert Hooke discovered the cell in 1665 by observing the cork of a tree (1:22). However, he discovered dead cells (1:49).
Antonie van Leeuwenhoek was the first scientist to discover living cells in 1674, observing microorganisms like Protozoa, Amoeba, Euglena, and Paramecium in pond water (6:35).
Fathers of Cytology:
Father of Cell: Robert Hooke (2:01).
Father of Indian Cytology: Arun Kumar Sharma (2:17).
Father of Modern Cytology: Karl p. sawanson (2:31).
Cell Sizes:
Largest cell: Ostrich egg (Shutumukh ka Anda) (3:37), measuring 17 cm in length and 13 cm in width (3:43).
Smallest cell: Mycoplasma, with a size of 0.1 micrometer (4:13).
Longest cell in the human body: Neurons/Nervous System (Tantrika Tantra) (4:45).
Largest cell in the female human body: Ovum (5:06).
Smallest cell in the male human body: Sperm (5:31).
Cell Regeneration and Non-Regeneration:
Some cells in the body can regenerate (9:24), such as those in the skin (8:11) and liver (8:56).
However, cells in the brain (9:46) and heart (9:59) cannot regenerate once damaged (10:04).
Types of Organisms based on Cells:
Unicellular Organisms (10:30): Made up of a single cell, e.g., Amoeba, Paramecium, Chlamydomonas, Euglena, Bacteria, and Protozoa (11:12).
Multicellular Organisms (11:41): Made up of multiple cells, e.g., humans, chickens, birds, and cows (12:15).
Levels of Organization in the Body (13:47):
Cell (कोशिका) → Tissue (उत्तक) → Organ (अंग) → Organ System (अंग प्रणाली) → Body (शरीर).
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