circulatory system

cicrulatory system

transports blood, oxygen, nutrients, hormones, and removes wastes (like carbon dioxide) around the body. It consists of the heart, blood vessels, and blood.

Functions

• Transport of oxygen, nutrients, and hormones

• Removal of waste products (e.g. CO₂, urea)

• Regulation of body temperature

• Protection (through white blood cells and clotting)involving circulation of blood and lymph.

major components are

Heart, blood vessels, blood

Heart

is the muscular organ that pumps blood through the circulatory system, ensuring the delivery of oxygen and nutrients to tissues while removing waste products.

blood vessels

are the network of tubes that carry blood throughout the body, including arteries, veins, and capillaries.

arteries

are blood vessels that carry oxygen-rich blood away from the heart to the body's tissues.

veins

are blood vessels that carry deoxygenated blood from the body's tissues back to the heart.

capillaries

are tiny blood vessels that connect arteries and veins, facilitating the exchange of oxygen, nutrients, and waste products between blood and tissues.

blood

Made up of:

• a vital fluid composed of red blood cells that transport oxygen, white blood cells that defend against infection, platelets that aid in clotting, and plasma that carries nutrients and waste throughout the body.

cicrulation types

Pulmonary and systemic

pulmonary circulation

portion of the circulatory system - transporting deoxygenated blood from the right ventricle of the heart to the lungs and returning oxygenated blood to the left atrium.

systemic cicrulation

the part of the circulatory system t- carries oxygenated blood from the left ventricle to the rest of the body . returns deoxygenated blood to the right atrium.

BLOOD CICULATION GUIDE

• Deoxygenated blood enters right atrium

• Flows into right ventricle

• Pumped to lungs via pulmonary artery

• Oxygenated blood returns via pulmonary vein

• Enters left atrium

• Flows into left ventricle

• Pumped to body via aorta

Circulatory system in response to excersize

During exercise:

• Heart rate & stroke volume increase

• Blood is redirected to working muscles

• Blood pressure rises

• Oxygen delivery and carbon dioxide removal are faster