Define human cells and structure of human cell|maxorbit

 Cell

The cell is the structural and functional unit of the living organism. A typical cell has two
major parts- the nucleus and the cytoplasm. The nucleus is separated from the cytoplasm by a
nuclear membrane, and the cytoplasm is separated from the surrounding fluid by a cell
membrane, also called plasma membrane.

Physical structure of cell

The cell is not merely a bag of fluid, enzymes and chemicals; it also contains highly organized

physical structures, called intracellular organelles. Structures of cell are followings:

A. Cell membrane

B. Protoplasm

a. Nucleus

      i. Nuclear membrane

     ii. Nucleolus

     iii. Nucleoplasm

     iv. Chromatin--

                          1. Heterochromatin

                           2. Euchromatin

b. Cytoplasm

      

         i. Organelles

1. Membranous organelles

         Mitochondria

         Endoplasmic reticulum

         Golgi complex

         Lysosomes

         Peroxisomes

2. Non membranous organelles

         Ribosomes

         Centrioles

         Filaments- Microfilaments, Intermediate filaments

         Microtubules

          ii. Inclusions

          1. Secretory granules

          2. Pigment granules

          3. Lipid and glycogen

          4. Crystals

You have to wait 30 seconds.

Click here