3704989
Description
Flashcards by Irene Casado Mercahnte, updated more than 1 year ago
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Created by Irene Casado Mercahnte
over 8 years ago
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| Question | Answer |
| HUMAN TISSUES | |
| Epithelial tissue | One/ more layers of cells. No spaces between them. Covers external surface (Skin)... + line cavities (stomach) + Glands. |
| 1. Characteristics | Cells FIRMLY ATTACHED to each other. If no, liquids would drip out. *Cells readily divide to make more cells. This helps this tissue recover after any sort of abrasions occur. *There are no blood vessels within it. *Nucleus can be seen easier |
| 2. Functions | Protection: As a barrier between the world and our body. Secretion: when our bodies need to release material, like hormones into the blood...this tissue produces and releases them Absorption: Epithelial tissue absorbs what we need when we eat. |
| Muscle tissue | composed of elongated cells, the muscle fibres which contract in response to stimuli. |
| 1.Types | 1.Skeletal muscles: muscles of the locomotor system. 2.Cardiac muscle. Heart 3.smooth muscle: muscles of the walls of some organs. |
| 2. Characteristics | The muscle fibres are elongated, cylindrical and striated (arranged in parallel). The nuclei of the muscle fibres are elongated and found along the sides of the fibres. |
| Nerve tissue | 1.neurons: cells capable of transmitting electrical impulses + control activitie of the organism 2:neuroglia cells which assist, protect and provide nutrients to the neurons. |
| 1. Caracteristics | It has the nucleus at the centre |
| Connective tissue | It´s composed of cells separated by an intercellular substance called the matrix. |
| 1.Characteristics | *most diverse *Found throughout the body *2 main components: cells and extracellular matrix –fibres (mainly collagen) and a viscous fluid. *variety of physical structures: tendons, ligaments, cartilage, bones, adipose tissue, blood and lymphatic tissue. |
| 2.Types | conjunctive tissue, cartilaginous tissue, adipose tissue, bone tissue and blood tissue. |
| 2.1 CONJUNTIVE | joins and links the other tissues to each other |
| 2.2 CARTILAGINOUS TISSUE | Forms part of the skeleton and provides support to the soft parts of the body. |
| 2.3BONE TISSUE | Forms part of the skeleton, provides support to the organism and protects the vital organs. |
| 2.4 ADIPOSE TISSUE | makes up the organism’s greatest energy reserve (lipids). Provides thermal insulation (it is found under the skin). It also protects some internal organs. |
| 2.5 BLOOD TISSUE | liquid matrix is called plasma. Suspended in the plasma are the blood cells: red blood cells or erythrocytes, white blood cells and platelets. |
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