Tissues Lecture 2 5 15 Quiz on Tuesday on Landmarks and Directional terms Bladder Normally 2 inches Up to 5 When about of way full start to get the urge to go to the bathroom You can actually hold a L worth of urine in your bladder How can your bladder hold more without bursting o Elasticity in tissues Tissues Muscle o Highly vascularized ample supply of blood flow Tells you needs lots of nutrients Lots of things travel through blood hormones messengers etc o Veins remove waste and arteries deliver nutrients o Movement o 3 types be able to see the histological differences Skeletal voluntary Gross movements Contracts to pull on bones or skin Characteristics o Striated o Multinucleate o Long cylindrical In walls of heart only in heart Function to pump blood heart Characteristics Cardiac involuntary o Striated o One nucleus per cell Smooth involuntary Walls of hollow organs o Contracts pressure builds and blood pumped out of the o Intercalated disks dark bands where the kinks are Desmosomes Gap junctions help increase the pressure in the heart o Ex Swallowing and sphincters that push food through digestive system o Stomach uterus esophagus intestines blood vessels etc Muscles that help control how wide or narrow those blood vessels are Function propel substance Characteristics o No visible striations no dark and light bands jk o One nucleus per cell o Spindle shaped cells o Nervous Composed of neurons and nerve support cells Brain spinal cord nerves Function Send impulses to other areas of the body Irritability conductivity Epithelial o Body coverings and linings o Glandular tissue o Functions Protection filtration absorption secretio Closely packed cells tight junctions and desmosomes Polarity Apical surface May bear microvilli or cilia Basal surface o Deep Epithelial tissue Noncellular basal lamina Glycoprotein and collagen Connective tissue reticular lamina o o o o Know the naming of tissues and be able to recognize their shape and basal and apical membranes
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