Tissue Basic Characteristics
Send and receive nerve impulses. Same embryonic layers, ecto, endo, meso-derm. Organs are a group of tissues. 4 types of tissues, epithelial, connective, muscle, nervous.
From ectoderm, sheet like, closely packed cells. Covers flat surfaces and lines cavities. Protection and diffusion. 3 shapes, squamous, cuboidal and columnar.
Single layer. For diffusion, little abrasion. 1) Simple squamous is flat. Found in blood vessels, lungs and cavities. 2) Simple cuboidal is oval. Found in small ducts and kidney tubules. 3) Simple columnar is tall and made for absorption and secretion. Found in stomach and intestine. Goblet cells=mucus. 4) Pseudostratified with nuclei scattered and cilia. Found in trachea, bronchi and uterus.
Stratified epithelial practical slide
Multiple layers made for protection, high abrasion areas prevents dry out. Found in skin, mouth, vagina, anus. Ex: keratinized palms and soles.
From mesoderm, made for structure and support. Lots of cells and fibers make it flexible. Loose dense and vascular tissue.
Connective-Loose, Adipose practical slide
Dense and vascular. 1) Loose, binding with a jelly like matrix, is fabric like to cover. Ex: Aerolar, most common binding. Adipose, fat tissue, fat cells most common triglyceride.
Connective-Dense, compact bone practical slide
Support. Firm matrix. 1) Hyaline cartilage most common, long bones, nose etc. Lawnae are holes full of cartilage cells "bubbles". 2) Bone, spongy, bone marrow has red and white blood cells. Compact, tree "trunk rings" are osteons.
Fluid matrix is plasma. 1) Erythrocytes are red, O2 and hemoglobin. 2) Leukocytes are white and are the immune system. 3) Platelests are responsible for clotting.
Contraction, fibers, long, narrow, made of myofibrils. 1) Smooth, spindle shaped cells. 2) Skeletal, striated, rapid movement. Voluntary muscle, attached to bone. Blunt cylinders, sacromers are boundries. 3) Cardiac, branching cylinders. Intercalated disks or striations. Involuntary muscle. Ex: Heart.
Nervous-Neuron practical slide
Central nervous system are the brian and spinal cord. Peripheral nervous system consists of nerves and ganglia outside of the brain and spinal cord. Neurons are axons that send and dendrites that receive. Glial cells secrete a myelin sheath.