The Skeletal System

Composed of 206 bones that provide support, protection, and movement for the body
Divided into two main parts: axial skeleton (skull, spine, ribcage, sternum) and appendicular skeleton (upper and lower limbs, pelvis, and shoulder girdle)
Functions:
- Support: provides a framework for the body
- Protection: encloses and protects internal organs
- Movement: acts as a system of levers and joints to facilitate movement
- Blood cell production: bones are responsible for producing blood cells
- Storage of minerals: bones act as a storage site for minerals such as calcium and phosphorus

Consists of the central nervous system (CNS) and peripheral nervous system (PNS)
CNS: brain and spinal cord
PNS: nerves that connect CNS to the rest of the body
Functions:
- Control and coordination: integrates and interprets sensory information and responds accordingly
- Regulation: regulates various bodily functions such as heart rate, blood pressure, and body temperature

Composed of skeletal muscles, smooth muscles, and cardiac muscles
Functions:
- Movement: enables movement and locomotion
- Support: provides support and stability for the body
- Regulation: regulates body temperature and blood pressure
- Protection: protects internal organs

Composed of the heart, arteries, veins, and blood vessels
Functions:
- Transportation: transports oxygen and nutrients to cells and removes waste products
- Regulation: regulates blood pressure and body temperature
- Protection: protects the body against infection and disease

Ball-and-socket joint that connects the femur (thigh bone) to the pelvis
Functions:
- Movement: enables movement and rotation of the leg
- Support: provides support and stability for the body

Temporary organ that develops during pregnancy
Functions:
- Nutrition: provides nutrients and oxygen to the fetus
- Waste removal: removes waste products from the fetus
- Hormone regulation: regulates hormone production during pregnancy

Ball-and-socket joint that connects the humerus (upper arm bone) to the scapula (shoulder blade)
Functions:
- Movement: enables movement and rotation of the arm
- Support: provides support and stability for the arm

Hinge joint that connects the humerus (upper arm bone) to the radius and ulna (forearm bones)
Functions:
- Movement: enables movement and flexion of the arm
- Support: provides support and stability for the arm

Hinge joint that connects the femur (thigh bone) to the tibia (shin bone)
Functions:
- Movement: enables movement and flexion of the leg
- Support: provides support and stability for the leg

The adult human skeletal system consists of 206 bones
Divided into two main parts: axial skeleton (skull, spine, ribcage, sternum) and appendicular skeleton (upper and lower limbs, pelvis, and shoulder girdle)
The skeletal system provides support, protection, and movement for the body
It also produces blood cells and stores minerals such as calcium and phosphorus

The central nervous system (CNS) consists of the brain and spinal cord
The peripheral nervous system (PNS) consists of nerves that connect the CNS to the rest of the body
The nervous system controls and coordinates the body's functions, regulates heart rate, blood pressure, and body temperature

The digestive system consists of the mouth, esophagus, stomach, small intestine, and large intestine
It ingests food and liquids, breaks down food into smaller particles, and absorbs nutrients into the bloodstream
The digestive system also eliminates waste products from the body

The muscular system consists of skeletal muscles, smooth muscles, and cardiac muscles
It enables movement and locomotion, provides support and stability for the body, and regulates body temperature and blood pressure
The muscular system also protects internal organs

The circulatory system consists of the heart, arteries, veins, and blood vessels
It transports oxygen and nutrients to cells and removes waste products
The circulatory system also regulates blood pressure and body temperature, and protects the body against infection and disease

The hip joint is a ball-and-socket joint that connects the femur (thigh bone) to the pelvis
It enables movement and rotation of the leg and provides support and stability for the body

The shoulder joint is a ball-and-socket joint that connects the humerus (upper arm bone) to the scapula (shoulder blade)
It enables movement and rotation of the arm and provides support and stability for the arm

The elbow joint is a hinge joint that connects the humerus (upper arm bone) to the radius and ulna (forearm bones)
It enables movement and flexion of the arm and provides support and stability for the arm

The knee joint is a hinge joint that connects the femur (thigh bone) to the tibia (shin bone)
It enables movement and flexion of the leg and provides support and stability for the leg

The placenta is a temporary organ that develops during pregnancy
It provides nutrients and oxygen to the fetus, removes waste products from the fetus, and regulates hormone production during pregnancy