Appendicular skeleton consists of the bones of the upper and lower extremities, including shoulder and the hip. Skeletal system includes cartilage and ligaments that join bones together at joints. 2. Compare the properties of the intercellular collagen and elastic fibers of skeletal tissue. * Describe the intracellular matrix of bone and
A joint is the location at which two or more bones make contact. They are constructed to allow movement and provide mechanical support and weight bearing. 2. What is a synovial joint? Synovial joints are made up of bones that come together to formulate the joint, the ligaments attach bone to bone and allow for the joint movement to be stable and in the correct direction.
The brain also stores the information in the memory and helps with emotional and intellectual process. The brain is like a control centre to the rest of the body it also detects the changes and responds to them. The spinal cord is a long cylindrical organ that runs inside the vertebrae. In a spinal canal has a central cavity containing cerebrospinal fluid thirty one of nerves branches off the cord to provide nerve supply to the whole of the human body. The brain stem (midbrain pons and medulla oblongata) Controls involuntary reflex actions The cerebellum Maintains posture and co-ordinates movement.
The human skeleton consists of approximately 206 bones all of shapes, sizes and functions. Our skeleton system has 5 main functions. These are to protect our internal organs, support our body shape & posture, and to aid movement. In addition to these basic functions, the human skeleton also performs more complex functions such as the storing of minerals to aid bone growth (e.g. calcium,) and lastly the creation of red blood cells which are used to transport oxygen around the body and to the muscles.
The actual surfaces of the bones that might touch the other are the articulating surfaces, and the cartilage covering those surfaces is called articular cartilage. Periosteum: A dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints. Articular cartilage: The cartilage covering the articular surfaces of the bones forming a synovial joint. Also called arthrodial
Axons speak. Neurons transmit messages when stimulated by signals from our senses or when triggered by chemical signals from other neurons. In response to this a neuron fires an impulse called the action potential. When a neuron fires the first section of the axon opens it gates and positively charged sodium ions flood through the cell membrane. This depolarizes that axon section, causing another axon gate to open, and then another, like a line of dominos.
The nervous system contains both the central nervous system (CNS) and peripheral nervous system (PNS). The “old brain” or brainstem controls the primary functions for life. This region contains the medulla, pons, reticular formation, and thalamus. The medulla sits at the base of the skull, regulates blood pressure, breathing, and heart rate. The pons connects the medulla with the cerebral cortex.
C) a group of muscle fibers that are all part of the same motor unit. D) a group of muscle fibers and motor neurons. E) a collection of myofibrils in a muscle fiber. 3) Put the following structures in order from superficial to deep: 1. muscle fiber 2. perimysium 3. myofibril 4. fascicle 5. endomysium 6. epimysium A) 1, 5, 4, 3, 2, 6 B) 6, 2, 5, 4, 1, 3 C) 6, 2, 4, 5, 1, 3 D) 1, 3, 5, 6, 4, 2 E) 2, 3, 1, 4, 6, 5 4) Interactions between actin and myosin filaments of the sarcomere are responsible for A) muscle fatigue. B) the conduction of neural stimulation to the muscle fiber.
Health & social care level 3 Unit 56 1.1 The anatomy and physiology of the human body explains that muscles are attached to the skeleton. They work like hinges or levers to pull or move particular joints when a muscle contracts, pulling the joint in the direction it is designed to move. Parts of muscles move antagonistically, that is, when one contracts, its opposite member relaxes to allow movement. Muscles can become slack, making movement slower and more difficult. Again, it explains that the human muscles move in command from the brain.
The movement of the bones is caused by muscles which pull on tendons that are attached to bone. Cartilage is a hard, smooth tissue that covers the end of bones. Between the cartilages of two bones which form a joint, there is a small amount of thick fluid called synovial fluid. This fluid lubricates the joint which allows smooth movement between the bones. The synovial fluid is made by the synovium.