Class Summary - Today we addressed the 3 main types of muscle tissues and their structure / characteristics. Skeletal muscle is attached to the bones by tendons. Skeletal muscle is cylindrical and has more than one nuclei. It is striated and has strong voluntary contractions. Smooth muscle lines hollow organs. It is involuntary and spindle shaped. It only has one nucleus and is not striated. Cardiac muscle is found in the heart. It is branched, striated, and has only one nucleus. It is involuntary. Next, talked about nervous tissue. We discussed that nervous tissue is found in the brain and the spinal cord. We talked about the three parts (and their purposes) of a neuron; dendrite, axon and body. We talked about nervous conducting impulses that are actually sensed in the brain. Neuroganglia take up most of the brain and they outnumber neurons 9-1. We also talked about Schwann cells which enclose all nerve cells that are located outside of the brain. Leftover time was spent on a Concept Map of tissues.
Homework - Tissues Concept Map, The test is scheduled for Thursday of next week. Students should be prepared to label a connective tissue diagram (collagen, adipose, blood, elastic and fibroblasts) Identify pictures of tissues and explain WHY they chose it Label the three pictures of junctions (gap, tight and adhesion) Label the parts of a neuron (no word bank) Use the one word 'c' words that describe tissue functions Answer several short answer questions about various tissues Label a graphic organizer of nervous tissue Match the neroglia to its function (microglia, ogliodendrocytes, astrocytes and ependymal cells) Match the cartilage to its function and location (hyaline, elastic, fibrocartilage)
Objectives - Students will be able to identify muscular tissue. Students will know the location and function of neurons. Students will identify neurons from a picture. Students will identify characteristics and appearance of different junctions.