Types of Tissues PDF

Human Biology Objectives to study Human Biology It will be basic to (2) subjects we will study them later (Anatomy and Histology) Histology is a tissue science Human Biology Cell+ Cell Tissue Tissue+ Tissue Organ Organ+ Organ System  Types of tissues...

Human Biology Objectives to study Human Biology It will be basic to (2) subjects we will study them later (Anatomy and Histology) Histology is a tissue science Human Biology Cell+ Cell Tissue Tissue+ Tissue Organ Organ+ Organ System  Types of tissues Tissue is a group of cells cemented(found) together to do specific function. Four main types of tissues: 1.Epithelial tissues. 2.Connective tissues. 3.Muscular tissues. 4.Nervous tissues.  Epithelial tissues Features Always found covering a surface. Cells are rest on basement membrane. Substances between the cells are few in amount.  Epithelial tissues Pseudo compound Simple E. T. Compound E. T. ciliated E.T.  Simple epithelial tissue: It consist one layer of cells  Compound epithelial tissue It consist more than one layer of cells 1.Simple squamous epithelial tissue Location: Wall of the digestive system Function: Protection  2.Cuboidal epithelial tissue Location: Glands, kidney Function: Secretion 3.Columnar epithelial tissue Location: Glands of stomach, villi of small intestine Function: Absorption  1.Compound squamous epithelial tissue Location: Skin, esophagus Function: Protection  Pseudo compound ciliated epithelial tissue Location: Nose, trachea Function: Protection against dust particles and germs.  Connective tissue Features:-.Not covering surfaces..Not rest on abasement membrane..Substances between the cells are large in amount  Connective tissue Proper Vascular Skeletal connective connective connective tissue tissue tissue Fats Blood Bone  Proper connective tissue 1. Adipose connective tissue Location: under skin Function: energy storage, insulation, shock absorber  Proper connective tissue 2. Elastic connective tissue Location: Lungs, Blood vessels Vocal cords Function: Elasticity  Proper connective tissue 3. Fibrous connective tissue Location: Tendons Function: Connect between muscles and bones  Proper connective tissue 4. Reticular connective tissue Location: Spleen, Liver, Bone marrow Function: Connection.Vascular connective tissue:.Blood cells.White blood cells (WBCs).Red blood cells (RBCs). Blood platelets White blood cells (WBCs) The biggest one of the blood cells. Called white because it lack of the haemoglobin pigment. It has a nucleus with many shapes due to the nucleus shape we have five types of wbcs  The bone marrow produced the new cells Normal count 4000-11000 Count of wbcs help us at diagnosis of diseases Examples of diagnosis 1. If the patient with total higher than the maximum count (12000) this patient may have flu 1. If the patient with highest total(90000) this patient may have blood cancer (luekemia) Examples of diagnosis. If the patient with total lower than the minimum count(1000) this patient may have Aids (HIV) or typhoid fever White blood cells (WBCs) Location: Blood Function: Defense mechanism Red blood cells (RBCs) Features: 1. Smaller than WBCS 2. Has disc biconcave shape 3. Enucleated cells Red blood cells (RBCs) 4. Life span 90-120 day 5. Dead cells goes to spleen and liver 6. Bone marrow produce the new cells 7. It has a haemoglobin pigment Red blood cells (RBCs) Location: Blood Function: Gaseous exchange  Blood platelets Location: Blood Function: Clotting factors  Skeletal connective tissue Bone Cartilage Osteiocyte Chondrocyte Bone cell Cartilage cell Bone Compact bone Location: Skeletal system Function: Allow movement, protection, support, attachment, give the body its shape, mineral storage (ca), produce blood cells  Cartilage Hyaline cartilage Location: Trachea Function: Keep air pathway open always  Elastic cartilage Location: Nose , Ear pinnae Function: Elasticity  Fibro- cartilage Location: Between tendons and bones and between bone and bone Function: Allow movement  Muscular tissue Smooth Skeletal Cardiac muscles muscles muscles  Smooth muscles Location: Wall of the digestive system Function: Allow movement  Skeletal muscles Location: Skeletal system Function: Allow movement  Cardiac muscles Location: Wall of the heart Function: Help in blood pumping Nervous tissue Location: Nervous system Function: Take nerve impulses