16 Questions
What is the main function of plasma cells?
To produce antibodies
What is the characteristic feature of the cytoplasm of mast cells?
Basophilic granular
What is the function of melanophores?
To carry melanin pigment
What type of connective tissue is characterized by very fine collagen fibers and mucoid matrix?
Mucous connective tissue
What is the origin of free macrophages?
From blood monocytes
What is the function of leucocytes in connective tissue?
To phagocytose microorganisms
What type of connective tissue is characterized by a soft, jelly-like substance rich in mucin?
Mucous connective tissue
What is the shape of the nucleus of plasma cells?
Eccentric rounded
What is the main function of loose areolar connective tissue?
To bind tissues together and surround organs
Which type of adipose connective tissue is rich in blood capillaries and pigments?
Multilocular adipose connective tissue
What is the main difference between unilocular and multilocular adipose connective tissue?
The number of globules of fat droplets
Where is white collagenous connective tissue mainly found?
In the cornea of the eye and tendons of muscles
What is the main characteristic of yellow elastic connective tissue?
It is elastic and stretchable
What is the function of unilocular adipose connective tissue?
To act as a heat insulator and support the kidney and other organs
Where is loose areolar connective tissue mainly found?
Around organs and blood vessels
What is the main difference between regular and irregular white collagenous connective tissue?
The arrangement of collagen fibers
Study Notes
Connective Tissue Cells
- Plasma cells: originate from B-lymphocytes, produce antibodies, and defend the body against infection
- Mast cells: oval shape, basophilic granular cytoplasm, central rounded nucleus, secrete heparin (anticoagulant) and histamine (allergic)
- Pigment cells (melanophores): connective tissue macrophages, carry melanin pigment
- Leucocytes: blood leucocytes that migrate to connective tissue, increase in cases of infection to phagocytose microorganisms
- Free macrophages: arise from blood monocytes, irregular surface, phagocytic cells, share in immune defense of the body
Connective Tissue Types
-
Embryonic connective tissue:
- Mucous connective tissue
- Mesenchymal connective tissue
-
Connective tissue proper:
- Loose areolar connective tissue
- Adipose connective tissue
- White collagenous connective tissue
- Yellow elastic connective tissue
- Reticular connective tissue
Mucous Connective Tissue
- Formed of CT cells, mesenchymal cells, fine collagen fibers, and mucoid matrix
- Sites: umbilical cord, vitreous humor of the eyeball, pulp of growing teeth
- Function: support the organs
Loose Areolar Connective Tissue
- Formed of all types of CT fibers, cells, and loose matrix
- Sites: around organs and blood vessels, subcutaneous connective tissue, submucosa and serous membranes
- Function: binds tissues together, surrounds organs
Adipose Connective Tissue
- Similar to loose areolar CT, but rich in fat cells
- Types:
- Unilocular adipose CT (White fat): fat cells with one large globule of fat, signet ring appearance
- Multilocular adipose CT (Brown fat): fat cells with multiple small globules of fat, provides heat for newborn babies
White Collagenous Connective Tissue
- Formed mainly of white collagen fibers and fibroblast cells
- Types:
- Regular type: regularly arranged collagen fibers, sites: tendon of muscles, ligaments, cornea of the eye
- Irregular type: irregularly arranged collagen bundles, sites: deep fascia, dermis of the skin, perichondrium of cartilage
Yellow Elastic Connective Tissue
- Elastic and stretchable, yellow in fresh state, stained with orcein stain
- Formed of yellow elastic fibers, fibroblast cells, and little matrix
- Sites: ligamenta flava, true vocal cord, wall of blood vessels
This quiz covers the different types of cells found in connective tissue, including plasma cells, mast cells, pigment cells, and leucocytes. Learn about their functions and characteristics.
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