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Mekdes Beyene
Anatomy Unit 9
| Question | Answer |
|---|---|
| What is a tissue? | A tissue is a group of similar cells that work together to perform a specific function in the body. |
| How many main tissue types are in the human body? | There are four main types: epithelial, connective, muscle, and nervous tissue. |
| What is epithelial tissue? | It covers body surfaces, lines organs and cavities, and forms glands. |
| What is the main function of epithelial tissue? | Protection, absorption, secretion, and filtration. |
| How is epithelial tissue classified? | By cell shape (squamous, cuboidal, columnar) and number of layers (simple or stratified). |
| What is simple epithelium? | A single layer of cells that allows materials to pass through easily. |
| What is stratified epithelium? | Multiple layers of cells that protect against wear and tear. |
| What are squamous cells? | Flat, thin cells that allow fast diffusion (found in lungs and capillaries). |
| What are cuboidal cells? | Cube-shaped cells that secrete and absorb (found in glands and kidneys). |
| What are columnar cells? | Tall, rectangular cells that line the digestive and respiratory tracts. |
| What is connective tissue? | It supports, connects, and protects other body tissues and organs. |
| What makes connective tissue unique? | It has cells spread out in an extracellular matrix of fibers and ground substance. |
| What are the main types of connective tissue? | Loose, dense, cartilage, bone, blood, and adipose tissue. |
| What is loose connective tissue? | A soft, flexible tissue that cushions and supports organs (example: areolar tissue). |
| What is dense connective tissue? | Tissue with many collagen fibers that form tendons and ligaments. |
| What is adipose tissue? | Fat tissue that stores energy, cushions organs, and insulates the body. |
| What is cartilage? | A strong, flexible connective tissue that supports and cushions joints. |
| What is bone tissue? | A hard connective tissue that provides structure, protection, and stores minerals. A fluid connective tissue that transports oxygen, nutrients, and waste. |
| What is muscle tissue? | Tissue that contract to produce movement in the body. |
| What are the three types of muscle tissue? | Skeletal, cardiac, and smooth. |
| What is skeletal muscle tissue? | Voluntary muscles are attached to bones that help with body movement. |
| What is cardiac muscle tissue? | Involuntary muscle found only in the heart; it pumps blood through the body. |
| What is smooth muscle tissue? | Involuntary muscles are found in internal organs like the stomach and intestines. |
| What is nervous tissue? | Tissue that sends and receives electrical signals to control body activities. |
| What are neurons? | Nerve cells that carry electrical impulses throughout the body. |
| What is neuroglia (glial cells)? | Support cells that protect, nourish, and assist neurons. |
| What tissue regenerates the fastest? | Epithelial tissue, because it divides rapidly to replace damaged cells. |
| Which tissue heals slowly? | Cartilage, because it has little to no blood supply. |
| What is the function of connective tissue fibers? | They provide strength, flexibility, and support (collagen, elastic, reticular fibers). |
| What tissue forms glands? | Epithelial tissue forms both endocrine and exocrine glands. |
| What tissue lines blood vessels and air sacs? | Simple squamous epithelial tissue. |
| What tissue type makes up tendons and ligaments? | Dense regular connective tissue. |
| What tissue makes up the brain and spinal cord? | Nervous tissue. |
| What tissues work together to move the body? | Muscle tissue (for movement) and connective tissue (for support). |
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Twin0324