Module 4: Tissues Flashcards
What does epithelial cells consist of and what does it cover?
Is a continuous sheet of tightly packed cells and it covers the body surface, lines body cavities and many of the organs and forms certain glands.
What is connective tissue?
The most widespread and the most varied; serves to connect the body together and to support, bind and protect organs.
What is nervous tissue?
Tissue with a high degree of excitability and conductivity that makes up the nervous system
What is muscle tissue?
Consists of contractile cells or fibers that effect movement of an organ or body part
What are stem cells?
Specialized cells that can differentiate into many different types of cells
What is fibrosis?
The repair and replacement of damaged tissue with connective tissue, mainly collagen.
What are Squamous Epithelium?
Epithelial tissue consisting of thin, flat cells
What are Cuboidal epithelium?
Epithelial tissue consisting of cells having a cube-like shape
What are Columnar Epithelium?
Epithelial tissue composed of cells having a tall columnar shape
What are simple epithelia?
Every cell touches the basement membrane
What are stratified cells?
Some cells stack of top of other cells and the upper layers of cells don’t touch the basement membrane.
What are exocrine glands?
Secrete their products into ducts -example: tears, sweat, or gastric juices
What are endocrine glands?
Secrete their products called hormones into the bloodstream
Explain oCollagenous fiber?
Strong and flexible; resist stretching; are the most abundant fibers
Explain Reticular Fiber
Occcur in networs and support small structures such as capillaries and never fibers
Explain Elastic Fibers
Made of a protein called elastin these fibers can stretch and recoil lie a rubber band
What does regeneration mean?
Damaged tissue cells are replaced with the same type of cells, resulting in functional new tissue.
What are neurons?
The units that conduct nervous impulses
What are Neuroglia?
Protect and assist hormones
What is Areolar Tissue?
Consists of collagen and elastin fibers in a soft gel-like matrix; connects many adjacent structures of the body; lies underneath almost all epithelia; surrounds blood vessels, nerves and trachea
Explain Adipose Tissue
Dominated by fat cells; forms supporting, protective pads around the kidneys; acts as storage depot for excess food; helps insulate the body to conserve body heat
Explain Reticular Tissue
Consists of loose network of retiulcar fibers and cells; forms the framework of the spleen, lympth nodes, and bone marrow.
Explain the steps in tissue repair
- When a cut occurs in the skin the severed blood vessels bleed into the wound. 2. A blood clot forms and then dries to form a scab. Beneath the scab white blood cells begin to ingest bacteria and cellular debris. 3. Healthy tissue around wound sends blood, nutrients, proteins and other materials necessary for growing new tissue to the damaged area. The newly formed tissue is called Granulation Tissue. Fibroblasts in the granulation tissue secrete collagen, which forms scar tissue inside the wound. 4. The surface area around the wound generates new epithelial cells. These cells migrate beneath the scab, the scab loosens and falls off to reveal new functional tissue.
What are membranes?
Thin sheets of tissue
What is mucous membrane?
Lines the body surfaces that directly open to the bodys exterior such as respiratory, digestive, urinary, and reproductive.
What is Cutaneous Membrane?
AKA the skin, this is the bodys largest membrane.
What is Serous Membrane?
Composed to simple squamous. Lines the body cavities in one continuous sheet. There are 3 sections: Pleura, pericardium, and peritoneum.
