Epithelial tissue Connective tissue Muscle tissue Nervous tissue
CH. 4 Topics to discuss: ( 150 words) 1. Choose a Tissue type (Epithelial, Connective, Muscle, Nervous) and describe its components, functions, and examples of locations of each. 2. Discuss the 3 types membranes 3. Describe the 3 major types of cartilage and where they can be located.
1. Epithelial Tissue
Epithelial tissue forms protective barriers and is involved in absorption, secretion, and sensation. It consists of closely packed cells with little extracellular material, supported by a basement membrane. Based on shape and layers, epithelial cells can be simple (single-layered) or stratified (multiple layers), with squamous, cuboidal, or columnar structures. This tissue lines organs, cavities, and surfaces, including the skin (epidermis), digestive tract (intestinal lining), and respiratory system (alveoli). It plays a crucial role in protection, filtration, and exchange of substances.
2. Three Types of Membranes
Membranes are thin layers covering surfaces or cavities. Mucous membranes line hollow organs exposed to the environment (digestive, respiratory, and urinary tracts) and produce mucus for protection. Serous membranes cover internal organs (pleura, pericardium, peritoneum) and reduce friction. Cutaneous membrane refers to the skin, offering protection from environmental damage while regulating temperature and sensory functions.
3. Types of Cartilage
Cartilage provides structural support and flexibility. Hyaline cartilage is the most abundant, found in joints, nose, trachea, and fetal skeleton. Elastic cartilage, found in the ear and epiglottis, allows for flexibility. Fibrocartilage, located in intervertebral discs and knee menisci, provides shock absorption and strength. These cartilage types play critical roles in movement, protection, and cushioning within the body.
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