Levels and Types of Tissues in the Human Body

The heart has four chambers: two atria and two ventricles.

Two upper chambers of the heart that receive blood.

Two lower chambers of the heart that pump blood out.

Blood vessels that supply the heart muscle with oxygen.

Blood vessels that carry blood away from the heart.

Blood vessels that carry blood back to the heart.

Tiny blood vessels where oxygen and nutrients are exchanged.

Arteries that carry deoxygenated blood to the lungs.

The main artery that carries oxygenated blood away from the heart to the rest of the body.

The human body is organized in several levels, from simple to complex starting with cells that group to form tissues; tissues grouping to form organs; and organs grouping and working together to form organ systems

Forms the outer layer of skin and lines body cavities. It's like a sheet of cells.

Connects different parts of the body, such as muscle to muscle, bone to muscle, and bone to bone. Includes cartilage, fat, blood, and bone.

Allows you to feel and sense things around you and respond to stimuli. Neurons are the building blocks.

Responsible for body movement. Includes skeletal and cardiac tissues.

The transport system that delivers oxygen and nutrients to cells and removes waste. It also carries hormones and antibodies.

The circulatory system is made of the heart, blood, and blood vessels.

The ability of an organism to maintain a stable internal environment.

Arteries carry oxygen-rich blood away from the heart to the body. Pulmonary arteries carry deoxygenated blood to the lungs.

Arteries have thick muscle and elastic fibers. The elastic fibers allow the artery to stretch under pressure, and the muscle helps push blood along.

Veins carry oxygen-poor blood back to the heart. Pulmonary veins carry oxygen-rich blood from the lungs to the heart.

Veins have thin muscle and elastic fibers compared to arteries. They have valves to prevent blood from flowing backwards. Body muscles help push blood along.

Capillaries connect arteries and veins, enabling the exchange of gases (oxygen and carbon dioxide) and nutrients between the blood and body cells.

Capillaries have extremely thin walls (one cell thick). This allows for efficient diffusion of materials.

Blood contains red blood cells (carrying oxygen), white blood cells (fighting infection), platelets (clotting), plasma (liquid component), hormones, and waste products.

Blood is pumped by the heart and carries essential substances such as nutrients, water, oxygen, and waste products throughout the body.

Blood is a mixture of liquids, solids, oxygen, and carbon dioxide.

Disk-shaped cells carrying oxygen to body cells and taking carbon dioxide away.

The liquid part of blood, mostly water, containing gases, salts, proteins, and other substances.

Larger cells involved in protecting the body from infection.

Cellular fragments crucial for blood clotting.

The molecule in red blood cells that carries oxygen.

The process where platelets and fibrinogen work together to stop bleeding.

A condition with an abnormally low number of red blood cells.

A bleeding disorder due to a lack of clotting factors.

Cancers of the blood cells.

Carries oxygen-rich blood from the lungs to the heart.

Carries oxygen-poor blood from the heart to the lungs.

The circulatory system with two separate loops: pulmonary and systemic.

Blood low in oxygen, returning from the body to the heart.

Blood high in oxygen, returning from the lungs to the heart.

Blood flow between the heart and the lungs.

Blood flow to the heart muscle itself.

Blood flow to all body tissues except the lungs and heart.

The upper chambers of the heart that receive blood.

The lower chambers of the heart that pump blood out.

Valve separating the right atrium and ventricle, preventing backflow.

Valve between the left atrium and ventricle, preventing backflow.

Blood vessel that carries blood toward the heart.

Blood vessel that carries blood away from the heart.