learning objectives exam 3

learning objectives exam 3 - Reviewforexam3...

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Review for exam 3 LEARNING OBJECTIVES – Ch 28 Characterize the symmetry of animals. -The back side is called the dorsal, the front is called the ventral.  Bi lateral symmetry developed we had increased cephalazation. The development of a head. And led to  the separation of body cavities. Thoratic, abdominal, and pelvic. These keep the organs separated. t Understand the evolutionary importance of bilateral symmetry. It lead to cephalazation, the development of the head. It allows parts of the body to evolve in different ways, permitting the segregation of organs in different parts of the body. s Understand cells, tissues, organs, and organ systems. Cells- germ layers in the developing embryo, there are three types of tissues: Ectoderm, mesoderm, and endoderm, these eventually develop into all of the tissues we have in our body. Four broad categories of tissues occur in adults: epithelium, connective, tissue, muscle tissue, and nerve tissue. Tissues, which are a bunch of cells grouped together, come together and make an organ and then organs come together and make an organ system. The human body has eleven different organ systems; the skeletal system, circulatory system, endocrine system, nervous system, respiratory system, lymphatic and immune system, digestive system, urinary system, skin or integumentary system, muscular system, and the reproductive system. s Discuss the different types of epithelium and their functions. Epithelium is protective tissue, it lines and covers body surfaces. Epithelium provides three different functions: It protects tissues from dehydration and damage, it provides sensory surfaces, and it secretes substances. d Types of epithelial cells and tissues: Simple Epithelium Squamous- lining of lungs, capillary walls, and blood vessels. Function: Flat and thin cells provide a thin layer across which diffusion can really occur. The cells from viewed from the surface look like tile. Cuboidal- Lining of some glands and kidney tubles, covering of ovaries. Function: cells rich in specific transport channels, functions in secretions and specific absorption. Columnar- Surface lining of stomach, intestines, and parts of respiratory tracts. Functions: Thicker cell layer, provides protection and functions in secretion and absorption. Stratified Epithelium Squamous- outer layer of skin; lining of mouth. Function: Tough layer of cells; provides protection Pseudostratfied Epithelium Columnar- lining parts of respiratory tract . functions in secretion of mucus; dense with cilia that aid the movement of mucus; provides protection. t Connective tissue supports the body C Dense structural materials and immune defense, connective tissue is derived from mesoderm and falls into three functional categories.
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1. Immune Connective Tissue; macrophages, lymphocytes 2. Skeletal Connective Tissue; Fibroblasts, cartlage, bone. 3.
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