Structure of the Main Tissues of the Body and Their Role
Autor: getracey • September 15, 2016 • Term Paper • 262 Words (2 Pages) • 969 Views
P2 Describe the structure of the main tissues of the body and their role.
Tissue group | Sub-type of tissue | Structure (image plus a few words) | Function (what does it do) | Where it can be found and what it does there (2 examples) |
Simple epithelial Tissue | Squamous | One cell thick on basement membrane. Flat | Allows substances to pass through e.g. O2 and CO2 | Alveoli, capillary walls |
Cuboidal | One cell thick on basement membrane. Square. | Secretion and absorption | Kidney tubules, ducts of glands | |
Columnar | One cell thick on basement membrane. Columns | Produce secretions | Lining of the upper airways | |
Ciliated | One cell thick. Column with cilia | Move secretions | Lining of upper airways | |
Stratified Squamous epithelium | Keratinised | Multiple layers. Contains keratin in the upper layers. | Protects, tough, water proof, protects against bacteria | Skin |
Non-keratinised | Multiple layers. Does not contain keratin in the upper layers | Protects, quite tough, protects against bacteria | oesophagus | |
Connective | Areolar | Cells are spaced in-between fibres of elastin and collagen. Fat cells are present in the tissue. | Collagen provides structure and firmness to tissue. Elastin make. the tissue flexible. | Throughout the body e.g. skin |
Adipose | Similar to areolar with more fat cells | Protects and insulates | Around main organs | |
Bone tissue | Made up of osteocytes (bone cells). There is spongy and dense bone tissue. Well supplied by blood vessels. | Support, protection and facilitates movement | Skull, sternum | |
Cartilage | Cells more widely spaced and there are 3 main types. More flexible than bone. | Support and flexibility | Nose and ears | |
Blood | Plasma RBCs White blood cells Platelets Nutrients | |||
Muscle Tissue | Smooth | Spindle shaped cells arranged in sheets | Contracts and relaxes to create movement not under conscious control | Gastrointestinal tract |
Striated | Elongated cell fibres running parallel to each other arranged in bundles | Contracts and relax to create movement under conscious control | Biceps | |
Cardiac | Muscle fibres are interconnected, contain multiple nuclei, unconscious control | Pumps blood | Heart | |
Nervous Tissue | Neurones (motor neurones and sensory neurones) |
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