Animal Tissues
- Created by: lineventer
- Created on: 07-04-19 14:47
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- Animal Tissues
- Epithelial Tissue
- Tightly packed, small intercellular spaces, basement membrane-underlies the tissue
- Functions: 1.Protection from- injury, loss of water, invasion by micro-organisms 2. Secretes chemical substances (glands), Absorbs nutrients (in small intestine), removes dust particles (air passages), excretes waste (sweat from skin)
- Found: Covering the body on the outside and lines internal organs
- Squamous Epithelium
- Types: Simple and stratified. Thin, irregular cells with large nucleus
- Found: Skin surface, lines mouth, oesophagus, vagina and blood vessels
- Cuboidal Epithelium
- Cells are square shaped
- Found: Lines ducts of glands and tubules of kidneys
- Columnar Epithellum
- Elongated cells
- Found: Lines intestines and gall bladder
- Ciliated Columnar
- Elongated cells, has cilia on surface
- Found: Lines trachea and fallopian tubes
- Goblet cell makes and secretes mucus- Mucus and cilia work together (trachea), cilia beating helps egg move down fallopian (fallopian)
- Connective Tissue
- Ligaments, tendons, cartilage, bone, blood (only liquid)
- Erythrocytes (red blood cells)
- No nucleus, cells are biconcave disks, contain haemoglobin (carry O2 in blood)
- Leucocytes (white blood cells)
- Produces antibodies to destroy pathogens (disease causing organism)
- Platelets
- Clots blood
- Plasma
- Liquid part of blood. Plasma trasports- water, liquid salts, nutrients, hormons, components (erythrocytes, leucocytes, platelets)
- Nerve Tissue
- Nerve cells- neurons
- Made of: Fibres-axons and dendrites that transport nerve impulses and cell bodies
- Sensory Neurons
- Transmits information from receptors to CNS
- Motor Neurons
- Transmits information from CNS (central nervous system- brain and spinal chord)
- Internevous Neurons
- Connects sensory and motor neurons
- Nerve cells- neurons
- Muscle Tissue
- Specialised tissue that can control and relax
- Skeletal Muscle
- Striated muscle-attached to bone. Responsible for voluntary movement
- Smooth Muscle
- Contractions are slower. Responsible for involuntary movement (stomach intestines)
- Cardiac Muscle
- Only found in walls of the heart
- Involuntary contractions and maintains constant rhythmic contractions
- Epithelial Tissue
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