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- Skeletal system. The skeletal system is composed of bones and cartilages. There are two parts of the skeleton; axial and appendicular. The axial skeleton consists of the bones of the head and trunk.
- Muscular system. The muscular system consists of all the body muscles. There are three muscle types; smooth, cardiac and skeletal muscles. Smooth muscle is found within walls of blood vessels and hollow organs such as the stomach or intestines.
- Cardiovascular system. The cardiovascular system is comprised of the heart and the circulatory system of blood vessels. The heart is composed of four chambers; two atria and two ventricles.
- Respiratory system. The respiratory system consists of a series of organs; the nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles and lungs (alveoli).
- Overview
- Skeletal System Function
- Skeletal System Parts
- Skeletal System Structure
- Skeletal System Diseases
- Interesting Facts
In humans, the skeletal system consists of bones, joints and associated cartilages. An adult human has 206 bones in their body and variety of different joints. Image shows a human skeleton with the major bones labeled. The human skeleton can be divided into two components: the axial skeleton and the appendicular skeleton. The axial skeleton is form...
Support
The first and most apparent function of the skeletal system is to provide a framework for the body. The presence of a firm bony skeleton allows the organism to have a distinctive shape adapted towards a particular lifestyle. For instance, in a fast-moving animal like the cheetah, the skeleton contains long, thin limb bones and an extremely flexible spine. The structure of the skeleton also allows it to absorb the impact of running at high speeds. The bones of birds are hollow, light and creat...
Integration with the Muscular System
The skeletal system also provides an important form of attachments to the muscular system. Bones and exoskeletons are hard and do not bend or move when muscles are flexed. This means that the contraction of muscle cells will lead to the shortening of muscles, while the bone retains its shape.This basic structure allows muscles to move different parts of the body, using forces generated while pulling on the skeletal system.
Protection
The next obvious function of the skeletal system is the role it plays protecting the fragile internal organs. In humans, this is seen in the skull, which surrounds the brain completely.It is also exhibited by the ribcage, which surrounds the lungs and heart but still allows for expansion. Even invertebrates like snails and prawns often have hard exoskeletons to protect themselves from predators. The rigid endoskeletonallows the body to rise up above the ground or stand upright, and bears the...
The anatomy of the skeletal system is complex, and it includes hundreds of bones in the human body. The anatomy of the system varies widely between organisms, as evolution has selected for various adaptations in certain species which change the structure and function of their bones.
In general, the skeletal system is structured to provide support against gravity and protect an animal’s internal organs. While this article mainly discusses the human skeletal system, most animals have some sort of skeleton. Some animals, like sponges, can have an extremely simplified skeleton made of calcium deposits within the animal.Others, lik...
Diseases of the skeletal system could be confined to one section of the skeleton such as changes to the curvature of the spine, or they could be a genetic disorder affecting all bones and joints such as arthritis or osteoporosis. The spine in healthy individuals is S-shaped, with a convex curvature for the thoracic region and the concave tilt in th...
Three bones in the inner ear, called malleus, incus and stapes, are the smallest bonesin the human body. The thigh bone, or femur, is the largest bone.The hyoid bone situated behind the lower jaw is also called a ‘floating’ bonebecause it is not part of any joint, and is not directly attached to any other bone.The position of the hyoid bone makes it extremely resistant to fractures. However, autopsies that reveal a broken hyoidbone indicate death from strangulation.Newborn babies have about 300 bones. Many of these bones fuse togetherto form the 206 bones of the adult.- Gabe Buckley
Oct 30, 2023 · Definition. Bone is a living, rigid tissue of the human body that makes up the body's skeletal system. Structure. Cortical bone - outer layer. Bone tissue (cancellous bone) - inner layers. Medullary canal - contains either red (active) or yellow (inactive) bone marrow. Types of bones.
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Oct 19, 2020 · Definition. Body systems are groups of organs and tissues that work together to perform important jobs for the body. Some organs may be part of more than one body system if they serve more than one function. Other organs and tissues serve a purpose in only one body system. Examples include the respiratory system, nervous system, and digestive ...
Jan 26, 2024 · Long bones: These are mostly compacted bones with little marrow and include most of the bones in the limbs. They tend to support weight and help movement. Short bones: These have a squat, cubed ...
- Bones support the body's structure and protect vital organs, but they also play a key role in blood cell production, the immune system, the storage...
- Following a varied diet with plenty of calcium, getting enough vitamin D, and exercising are important for bone health. Avoiding smoking and limiti...
- Various health problems can affect the bones. Signs of osteoporosis include a loss of height, an increasingly stooped posture, and fractures that h...
Oct 24, 2022 · In adults, the skeletal system includes 206 bones, many of which are shown in Figure 14.2.2 14.2. 2. Bones are organs made of dense connective tissues, mainly the tough protein collagen. Bones contain blood vessels, nerves, and other tissues. Bones are hard and rigid due to deposits of calcium and other mineral salts within their living tissues.
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Oct 25, 2023 · Main bones of the skeletal system. We’ll begin by looking at the skeletal system. As the name implies, the structural and functional unit is bone–a highly specialized and hard connective tissue. Bones can be classified according to two major criteria, yielding different types of bones: Compact and spongy bone (according to strength)
