The three main types of blood vessels in the human body are the arteries, the veins, and the capillaries.
blood vessel, artery, arteriole, vein, venule, venous valve, capillary, circulatory system, heart, smooth muscle, respiratory gas, blood flow, squamous epithelium, connective tissue
Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary circulation carries oxygenated blood from the lungs to the heart.
Connective tissues include loose and dense connective tissues, adipose tissue, blood, tendon and bone tissue.
This animation introduces the most important systems of the human body.
This animation introduces the most important organ systems of the human body.
Skeletal muscles form the active part of the locomotor system: they move the bones they are attached to.
The heart is the central pump of the cardiovascular system beating several billion times over our lifetime.
Human blood consists of blood cells and plasma.
Surface epithelia cover the external and internal surfaces of the body.