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Circulation and Respiration
Vein
Vein definition: A blood vessel that carries blood to the heart.
Related Terms
Alveolus
Artery
Asthma
Atrium
Blood
Blood Pressure
Bronchus
Capillary
Cardiovascular System
Circulatory System
Diaphragm
Emphysema
Heart
Heart Attack
Hemoglobin
Hypertension
Larynx
Lung
Lymph
Lymphatic System
Lymph Node
Pharynx
Plasma
Platelet
Pulmonary Circulation
Red Blood Cell
Respiration
Respiratory System
Systemic Circulation
Trachea
Ventricle
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