What is the Circulatory System?
The circulatory system is a network of organs and vessels that is responsible for transporting blood, oxygen, nutrients, hormones, and waste products throughout the body. It consists of the heart, blood vessels, and blood.

Components of the Circulatory System
- Heart: The heart is a muscular organ that pumps blood throughout the body.
- Blood Vessels: There are three types of blood vessels - arteries, veins, and capillaries. Arteries carry oxygen-rich blood away from the heart, veins carry oxygen-poor blood back to the heart, and capillaries are tiny blood vessels where oxygen and nutrients are exchanged with tissues.
- Blood: Blood is a fluid that carries oxygen, nutrients, hormones, and waste products throughout the body. It is made up of red blood cells, white blood cells, platelets, and plasma.

Function of the Circulatory System
The circulatory system plays a crucial role in maintaining homeostasis in the body by delivering oxygen and nutrients to cells, removing waste products, regulating body temperature, and fighting infections.

What is the Skeletal System?
The skeletal system is a framework of bones and cartilage that provides support, protection, and movement for the body. It consists of bones, cartilage, joints, and ligaments.

Components of the Skeletal System
- Bones: Bones are hard, rigid organs that make up the skeletal system. They provide structure, support, and protection for the body.
- Cartilage: Cartilage is a tough, flexible connective tissue that cushions joints and helps with movement.
- Joints: Joints are where two or more bones meet. They allow for movement and flexibility.
- Ligaments: Ligaments are tough bands of connective tissue that connect bones to other bones and help stabilize joints.

Function of the Skeletal System
The skeletal system supports the body, protects internal organs, allows for movement, produces blood cells, and stores minerals such as calcium and phosphorus.