Tissues

epithelial, muscle, nervous and connective

one singular

two or more layers

one layer but looks like more

flattened cells

has cube shaped cells

has tall column shaped cells

secrete into ducts leading to body surfaces

lack ducts secrete products into spaces inside the body

Long and cylindrical cells (fibers) – Sartorius muscle longest in the body (60cm) Multinucleated Striated – arrangement of contractile proteins actin and myosin Under voluntary control Attached to bones via tendons – movement Allow flow of material – swallowing, urination and defecation

cylindrical but tapered at each end single nucleus

branched and striated single nucleus autorhythmic

ependymal cells (produces CSF) oligodendrocytes (produce myelin sheath CNS) astrocytes(provide glucose to neurons) microglia

satelitte cells Schwann cells myelin sheath to pns

most abundant binds supports protects insulates transports

tough but flexible avascular 3 types hyaline elastic fibrocartilage

Remodels in response to stress Structural unit called an osteon – central canal Osteocytes also trapped in lacunae Communicate through tiny canals - Canaliculi produces RBC

Red blood cells (RBC) or Erythrocytes suspended in liquid matrix (plasma), transport oxygen (hemoglobin) and CO2 RBC are biconcave (increased surface area for binding of oxygen) and lack nuclei

White blood cells (leucocytes) involved in immune response Phagocytosis

involved in clotting process

between muscles anchors skin to underlying tissue embedded with all three type of fibers elastic fibroblast collagen

regular fibers all travel in same direction (tendons and ligaments) Irregular - fibers travel in different directions (dermis of the integument)

functions as a fuel reserve adipocytes store triglycerides

tight junctions - form a leak proof seal adhesion junctions (desmosomes) found between cardiac muscle cells gap junctions have small holes connecting the cytoplasm of adjacent cells