Circulatory System Overview

Venule Pressure

• Venules have the lowest pressure in the circulatory system.

Circulatory System II - Overview

• Venules have the lowest pressure.

Great Vessels

• The aorta is the largest artery, originating from the left ventricle.
• It ascends, curves downwards, and then descends further, forming the ascending aorta, aortic arch, and descending aorta.
• The descending aorta is further divided into the thoracic and abdominal aorta, based on location.

Aortic Arch Branches

• The aortic arch branches into three major arteries: the brachiocephalic trunk, left common carotid artery, and left subclavian artery.

• These vessels supply blood to the head, neck, and upper extremities.

Arteries of the Upper Limb

• The subclavian artery continues as the axillary artery, and then branches further into the brachial artery.
• The brachial artery then branches into the radial and ulnar arteries.
• These arteries supply blood to the upper limb.

Arteries of the Lower Limb

• The femoral artery reaches the knee, giving rise to the popliteal artery.
• The popliteal artery divides into anterior and posterior tibial arteries and fibular arteries.
• These arteries supply blood to the lower limb.

Veins of the Upper Limb

• Superficial veins (cephalic and basilic) are close to the surface.
• Deep veins run alongside arteries, having the same names.
• The radial and ulnar veins merge to form the brachial vein.
• The brachial vein becomes the axillary vein after passing the pectoralis major muscle.
• The axillary vein becomes the subclavian vein under the clavicle.

Veins of the Lower Limb

• Superficial veins (great saphenous and small saphenous) are visible on the surface.
• Deep veins (anterior and posterior tibial veins, fibular veins) drain into the popliteal vein.
• The popliteal vein becomes the femoral vein in the thigh region.

Intravenous Injection

• Procedures for intravenous injections involve precise needle placement and angle to avoid tissue damage.
• Different needle angles and depths are identified for different injection types.

Explore the fascinating structure and function of the circulatory system in this quiz, focusing on aspects such as venules, the aorta, and arteries of the upper limb. Understand the pressure dynamics in blood vessels and the significance of major arteries. Test your knowledge on the anatomy and physiology of the circulatory system!