Term
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Definition
| Epithelia are sheets of closely packed cells, forming the inner or outer lining of structures and glands |
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Term
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Definition
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Term
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Definition
| connective tissue complex |
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Term
| Beneath the basement membrane is a layer of________ __________ reffered to as __________ ___________. |
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Definition
| connective tissue, Lamina propria |
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Term
| What are Intermolecular junctions? |
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Definition
| seal the space between the cells, and some of which provide communication between one cell and the next |
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Term
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Definition
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Definition
| dense agregations of fibrillar materials in the cytoplasm |
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Term
| deepest of the intercellular junctions are complex plaque shaped structures are called? |
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Definition
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| The prominent features desmosomes are a mass of fibres within the ______________ and fine fibres in the _______________spaces |
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Definition
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Term
What is the six functions of epithelia? |
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Definition
1. To cover and line surfaces
2. secretion of glandular cells
3. absorbtion - e.g. digestive system
4. sensory - e.g. skin
5. Protecton - e.g. skin
6. Reproduction - e.g. germinal epithelium in testis |
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Term
| epithelium tissues can be divided into 2 main groups. What are they and explain. |
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Definition
1. Simple epithelium - one layer of cells
2. Stratfied epithelium - contains more then one layer |
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Term
| what are simple squamous epithelium ? |
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Definition
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Term
| what do the simple squamous epithelium form and explain |
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Definition
| Mesothelium that lines body cavities and covers much of the Gastro-Intestinal Tract, Lungs and heart |
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Term
| Where is the Simple cuboidal epithelium found? |
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Definition
| it is found covering the ovary, many glands both as secretory cells and lining of the ducts |
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Term
| What does the Simple Columnar epithelium do? |
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Definition
| Lines the ducts of many glands, digestiv tract, and the gall bladded |
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Term
| what are the Pseudostratified epithelium attached to and where is it found? |
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Definition
| they are attached to the basement membrane and it is found along the upper respiratory passageway and in the epidiymis of the male reproductive system. |
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Term
| what do the Pseudostratified epithelium look like? |
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Definition
| They look stratified because nuclei are at different levels but are attached to the basement membrane |
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Term
| What does the classification depend on during stratified epithelium. |
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Definition
| classification depends entirely on the apical (surface) layer only |
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Term
| What does non-keratinized form and explain. |
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Definition
| non-keratinized form lines the wet surface such as the mouth esophagus and vagina |
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Term
where is the keratinized version found?
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Definition
| keratinized version is found mainly in the skin and the surface cells transformed into a tough layer of material called Keratin. |
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Term
| what does the transitional epithelium line? |
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Definition
| it lines the Urethers and the Unrinary Bladder |
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Term
| what are the four functions of the connective tissues and explain? |
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Definition
1. Support
2. Protection - forms capsules around organs
3. storage- adipocytes (fat cells) are the major cells of ADIPOSE TISSUE , a specilized typeof tissue. The tissue is a source of energy
4.Defence- cells of the immune systems, lymphocytes and Macrophages migrate into Connective Tissue |
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Term
| What are Fibroblasts and explain? |
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Definition
| long fibrillar cells, that are responsible for the production of ground substance and connective tissue fibres. |
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Term
| What do Fibroblasts transform to? |
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Definition
| They transform into cartilage cells (chondrocytes) and bone cells (osteocytes) |
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Term
| What are macrophages capable of? |
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Definition
| They are capable of engulfing and digesting damaged cells or pathogens. |
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Term
| what can macrophages release. |
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Definition
| They may also release chemicals that mobilise lymphocytes of the immune system |
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Term
| Where are Mast cells found? |
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Definition
| they are small cells found near blood vessels |
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Term
| What do Mast cells contain? |
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Definition
| cells contain many vesicles filled with HEPARIN and HISTAMINE which are chemicals that react to injury and infection. |
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Term
| what are found in Adipose cells and what does it do? |
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Definition
| In adipose cells, there are large droplets of fat. in fact it is so large that it forces all the other organelles, including the nucleus, to the perphery of the cell |
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Term
| Connective tissue dominated by adipose cells are called? |
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Definition
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| What is also found in connective tissue explain? |
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Definition
| Lymphocytes, plasma cells of the immune system, Eosinophils and basophils of the circulating white blood cells. |
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Term
| Loose Connective tissue is also called? |
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Definition
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| what does loose connective tissue consist of? explain each. |
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Definition
all the cells and fibres such as Collagen, Elastic and reticular
Collagen-fibes are thick, un branced and are by far the most commone
Elastic - fibres are thin and branced, they may be wavy or curly and are capable of stretching
Reticular - fibres are very thin and form the connective tissue framework in special organs |
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Term
| what do Collagen, elastic and reticular provide? what does it form? |
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Definition
| it provides 'packing' of the spaces of the body and forms the hypodermis, the deeper layer of the skin |
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Term
| what happens with loose connective tissue and what is it called? |
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Definition
| loose connective tissue has a predominance of fat cells it is called adipose tissue |
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Term
| This kind of tissue is common in ____________ of organs and the ___________ of the skin |
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Definition
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