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Science 8 biology 1
| Question | Answer |
|---|---|
| Cells | The smallest unit that is able to perform the basic functions of life. |
| Tissue | A group of similar cells that are organized to do a specific job. 4 Major types of tissues: 1. Muscle tissue. 2. Connective tissue. 3. Epithelial tissue. 4 nervous tissue |
| Organ | A structure in a plant or animal that is made up of different tissues working together to perform a particular function |
| Organ system | A group of organs that together perform a function that helps the body meet its needs for energy and materials. |
| Muscle tissue | Enables the movement of the body through muscle contraction. Types of muscle tissue: Striated or skeletal, cardiac, and smooth. |
| Connective tissue | Functions to hold parts of the body together, providing support, protection, strength |
| Epithelial tissue | Lines the body surfaces. It protects other tissues from dehydration and physical damage. |
| Nervous Tissue | Carries information throughout the body. |
| Organism | An individual living thing, made up of one or many cells, that is capable of growing and reproducing. |
| Skeletal System | The framework of bones that supports the body, protects internal organs, and anchors all the body's movement. |
| Homeostasis | A condition needed for health and functioning in which and organism or cell maintains a relatively stable internal envirionment. Example: Drinking water after you sweat helps mantain homeostasis because you are maintaining the right body temperature. |
| Blood | A fluid in your body that delivers oxygen and other materials to cells and removes carbon dioxide and other wastes. |
| Axial skeleton | The part of the skeleton that forms the axis. It provides support and and protection. |
| Immovable Joints | Locks bones together like puzzle pieces. The bones of your skull are connected by immovable joints. You can not move these bones. |
| Slightly Movable joints | The Joints are able to flex slightly. Your ribs are connected to your sternum by slightly movable joints. |
| Freely Movable Joints | The Joints allow your body to bend and to move. Tissues called ligaments hold the bones together at movable joints. |
| 3 types of muscle ,1. Skeletal Muscle | Skeletal muscle- The muscles that are attached to your skeleton. Performs voluntary movement, which is movement you chose to make. |
| 3 types of muscle, 2. Smooth Muscle | Found inside some organs, such as the intestines and the stomach. It performs automatic movement. You have no control over the movement it makes. |
| 3 types of muscle, 3. Cardiac Muscle | Moves without conscious control. Your heart is made out of it. |
| Hormone | A chemical that is made in one organ and travels through the blood to another organ. |
| Vein | A blood vessel that carries blood back to the heart. |
| Tendon | A tough band of fibrous connective tissue that usually connects muscle to bone. |
| Ligaments | connects a bone to another bone. |
| Joint | The location at which two or more bones make contact. |