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Connective Tissue Histology, Assignments of Histology

Assignment questions and answer based on connective tissue histology.

Typology: Assignments

2020/2021

Available from 01/04/2022

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Histology
Connective Tissues
ASSIGNMENT III
1. DISCUSS THE HISTOLOGIC CHARACTERISTICS AND FUNCTION OF THE
FOLLOWING CELLS OF THE CONNECTIVE TISSUE:
FIBROBLASTS
ADIPOCYTES
MACROPHAGES
MAST CELLS
PLASMA CELLS
LEUKOCYTES
Ans :
CONNECTIVE TISSUE
HISTOLOGICAL
CHARACTERISTICS
FUNCTION
FIBROBLASTS
Fibroblasts are
spindle-shaped, which
means they are elongated,
large, and flat in
appearance. And their
nucleus is flat and oval.
It is helping for the
healing of wounds,
these cells produce
fibers.
ADIPOCYTES
Fat droplets are present
inside the cytoplasmic
layer.
Storage is the main
function. It will store
fatty acids and glucose
for producing chemical
energy.
MACROPHAGES
Oval-shaped nucleus and
mitochondria are present
in the cytoplasm.
Mitochondria is
rod-shaped.
It will help for the
detection of
microorganisms and
ward off other harmful
organisms and
bacteria. It will release
cytokine at the time of
inflammation.
MAST CELLS
Cell outline of the cell is
sometimes oval and
Same as macrophages
it will help for immunity
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Connective Tissues

ASSIGNMENT III

1. DISCUSS THE HISTOLOGIC CHARACTERISTICS AND FUNCTION OF THE

FOLLOWING CELLS OF THE CONNECTIVE TISSUE:

● FIBROBLASTS

● ADIPOCYTES

● MACROPHAGES

● MAST CELLS

● PLASMA CELLS

● LEUKOCYTES

Ans : CONNECTIVE TISSUE HISTOLOGICAL CHARACTERISTICS

FUNCTION

FIBROBLASTS Fibroblasts are spindle-shaped, which means they are elongated, large, and flat in appearance. And their nucleus is flat and oval. It is helping for the healing of wounds, these cells produce fibers. ADIPOCYTES Fat droplets are present inside the cytoplasmic layer. Storage is the main function. It will store fatty acids and glucose for producing chemical energy. MACROPHAGES Oval-shaped nucleus and mitochondria are present in the cytoplasm. Mitochondria is rod-shaped. It will help for the detection of microorganisms and ward off other harmful organisms and bacteria. It will release cytokine at the time of inflammation. MAST CELLS Cell outline of the cell is sometimes oval and Same as macrophages it will help for immunity

Connective Tissues

irregularly arranged. It has one nucleus at the center. from foreign organisms and help for inflammatory processes. PLASMA CELLS Hetero chromatin is present inside the nucleus in a clock face arrangement and the structure of the nucleus is eccentric. Factory of the cell for the production of immunoglobulin and its secretion. LEUKOCYTES Irregularly arranged cell and white. It will battle against infections and other disfunction

2. DISCUSS THE DIFFERENT FIBER TYPES COMPRISING THE CONNECTIVE TISSUE: ● COLLAGEN ● RETICULAR ● ELASTIC Ans : COLLAGEN FIBER: The major function of collagen fiber is to give strength to the tissues. Mainly to the skin and provide elasticity. These are insoluble in nature. Mainly present in the dermal region; skin, cartilage, bone, etc. Under the microscope, the fibers will appear in a dark and white band in-between. Parallel fibrils of collagen molecules have 50-90 nm in diameter. RETICULAR FIBER: Reticular fibers are present in the specialized loose connective tissue and form a supporting stroma for some tissues and organs. These are extracellular fibers with a diameter of 100-150 nm. They do not possess the collagen bundle appearance, they appear like fibers with branching. At the time of wound healing, the fibroblast cells will produce reticular fibers. These fibers are later replaced by collagen fiber specifically type I collagen fiber. ELASTIC FIBER: Cannot use conventional methods for analyzing elastin fibers and elastic fibers require separate stains. The arteries and arterioles have a concentric sheet of elastic fibers, by the production or release of smooth

Connective Tissues

b. DENSE IRREGULAR CONNECTIVE TISSUE: Here the fibroblasts and collagen fibers are arranged in a disordered manner. The skin consists of these kinds of connective tissue.

  1. SPECIALIZED CONNECTIVE TISSUE: This type of tissue includes cartilage, bones, and blood. a. CARTILAGE: Intercellular matrix of cartilage is resistant to compression and is pliable and solid in structure. Chondrichthyes are secreted in the matrix cavities. Most of the cartilages in the embryonic state are replaced as bone-in adults except the joint of the ear, the tip of the nose, and adult limbs, etc. b. BONES: The ground substance of bone is hard and non pliable because of the presence of calcium salts and collagen fibers. The main function of bone is it will protect other organs and tissues from mechanical destruction. Osteocytes or bone cells are produced inside lacunae. In the bone, the bone marrow produces blood cells. c. BLOOD: Is the only one fluid connective tissue. Blood contains RBC, WBC, and platelets. Blood is a circulating fluid to help the transport of various substances.