Cell

Assalamu alaikum everyone. Hope you all are fine. I'm also good. Today I'm going to talk about "Cell", mainly animal cell.

Cell: Cell is the structural and functional unit of all living system.

Types: 2 types-

Prokaryotic cell: lack of nuclear membrane. This type of cells are found in bacteria.

Eukaryotic cell: have a distinct nucleus surrounded by a nuclear membrane.

Parts of a cell: 2 basic parts-

1.Cytoplasm

2.Nucleus

Outermost covered by cell membrane.

Shape: Varies may be flattened, cubical, columnar, fusiform, stellate, pyramidal and so on.

Size: varies from about 5 to 50 micrometer. A mature ovum is one of the largest cells, measuring about 130 micrometer.

Cell membrane: Outer limit of the cell is known as cell or plasma membrane.

Function of cell membrane:

1. Act as physical barrier to enclose cell contents.

2. Maintains communication between cell.

3. Regulates material movement into and out of the cell.

Cytoplasm: Contents of cells between the plasma membrane and nuclear envelope. It has two parts- cytosol and organelles.

Function of cytoplasm:

1. Provides support for organelles.

2. Serves as the viscous fluid medium through which diffusion occurs.

3. Carry out specific metabolic activities of the cell.

Nucleus: Containing the code for all of a cells enzymes and other proteins, the nucleus is the command center of the cell.

Components: consists of-

1. Nuclear envelope

2. Chromatin

3. Nucleolus

4. Nucleoplasm.

Function: Contains DNA.

Thanks for reading. Next time I will share something new. Allah Hafiz.