Jab 4 Histology Essay

1686 Words Feb 3rd, 2012 7 Pages
Lab 4 Histology Name AL

List the four types of tissue found in the human body and give an example of each.
1. Epithelial
2. Connective
3. Muscular
4. Nervous

Epithelial tissue
What are the characteristics of epithelial tissue? it never has contact with another cell, it always has a free surface. They contain no blood vessels (avascular) and depend on underlying tissues for needed nutrients and oxygen sources to maintain homeostasis. it is usually very thin for this reason. The cells are tightly packed together. composed almost entirely of cells. apical and basal surfaces

What is the function of epithelial tissue? protection, secretion, and absorbtion

Where is epithelial tissue found? Epithelial tissue is
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Although the perichondrium is well-vascularized, cartilage tissue proper is avascular, which means that oxygen and nutrients have to diffuse from blood vessels in the perichondrium to the chondrocytes within the cartilage proper.

Identify:
1.connective tissue
2. neutrophil
3. lamina propria
4. vacuole containing fat droplet

[pic]

This image shows a dried section of compact bone. Like cartilage, bone cells (osteocytes) occupy spaces (lacunae) found within the dense matrix. A major difference, however, is that the matrix is calcified in bone, which endows bone with the property of hardness and the ability to resist compressive forces. This calcified matrix is deposited in layers called lamellae (singular = lamella) approximately 3-7 microns thick. The most common unit of structure in compact bone is the Haversian system or osteon. In each Haversian system, the lamellae are arranged concentrically around a central Haversian canal which houses nerves and blood vessels (unlike cartilage, bone is well supplied with blood vessels). The lacunae that house mature osteocytes in living bone appear as tapered, black spaces arranged around the concentric lamellae. Slender, branching tubules called canaliculi ("little canals") radiate out from the lacunae to form an extensive network of passageways that connect the bone cells to each other and to the blood supply in the Haversian canal.
Identify:
1. lacunae
2.

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