different types of cells found in human body

7/28/2019 Different Types of Cells Found in Human Body

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Submitted by: Retina Shrestha

To: Smriti Gurung


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Human body is composed of numerous cells ranging

from 50 to 75 trillions and about 210cell types

Cells are oriented into groups to form specializedtissues and finally organs.

Many cell types in human like:

Glandular cells-salivary gland cell

Alimentary canal or digestive system cells-

paneth cellsGoblet cells

Endocrine cells-ovarian endocrine cells

Exocrine cells-acinar cell of pancrease


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A cell that is highly specialized for theassembly and packaging of proteins forexport.

These cells take up amino acids from theblood and assemble them into enzymes.

The enzymes manufactured are Amylase,

Trypsin and Lipase.

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zymogen

Plasma membrane

Central vacuole

Golgi apparatus

Nuclear membrane

nucleolus

mitochondria

Endopalsmicreticulum


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Paneth cells are large cells,situated within therecesses of the Intestinal Glands,that possessprominent glycoprotein-containing secretory

granules. The precise function of these cells are not

known.

The large secretory granules found in the apicalcytoplasm of paneth cell contain theantibacterial enzyme lysozyme.

Contribute to the regulation of intestinal flora.


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CT, connective tissue of the Lamina Propria; G, Golgi Apparatus; L, Lysosome; M,mitochondrion; N, Nucleus; Nu, Nucleolus; RER, rough Endoplasmic Reticulum;S, secretory granule; arrow, base of Paneth cell

Fig. Paneth cell of small intestine.CT, connective tissue of the Lamina Propria; G, Golgi

Apparatus; L, Lysosome; M, mitochondrion; N, Nucleus; Nu,Nucleolus; RER, rough Endoplasmic Reticulum; S, secretorygranule


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The break down of large particles into smallerones is facilitated in the oral cavity by thesecretions from many different salivary glands.

The secretions involve saliva. Salivary secretions are divided into two major

categories : serous and mucous.

Serous secretions are watery , non viscous andproteinaceous.

Mucous secretions are mucoid,viscous, andrich in polysaccharides and mucoproteins.


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A : serous cellB : mucus cell

Fig: cross-section of salivary gland


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An endocrine cell from the ovary synthesizesand secrets steroid hormones which areconstructed from cholesterol.

The cell,shaped like a long , slender football, isfound in the theca interna of a growing folliclein the ovary,where it secrets a steroid hormonethat is a precursor of the female sex hormone,

estrogen.


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mitochondria

Lipid droplets

SER

erythrocytes

Fig: Ovarian cell


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Goblet cells are glandular simple columnarepithelial cells whose sole function is to secretemucin, which dissolves in water to formmucus.

The epithelium lining of the intestine and lungscontain many goblet cells.

The primary function is to secrete mucus , aslippery , viscous substance, rich in

mucopolysaccharides , that protects andlubricates the lining of the intestine.

They usually have a broad apex and a narrow

base.


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Fig, illustrates the relationship between the differenttypes of cells that line the trachea and bronchioles in thelung. The three cell types shown hre are the elongateciliated epithelial cells, goblet cells and basal cells.

Goblet cell

Ciliary cell

Basal cell


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Mucus droplets

Golgi apparatus

Nucleus

RER

Fig: Goblet cells of intestine

different types of cells found in human body

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