Biology · Grades 8–11
Circulation, vessels and blood components · Revision sheet
Classify vessels by direction relative to the heart.
Learn the idea
Arteries
Arteries carry blood away from the heart; oxygen content is not the defining rule.
Veins
Veins carry blood toward the heart; some contain valves.
Capillaries
Capillaries provide exchange pathways between blood and tissues.
Components
Red blood cells, white blood cells, platelets and plasma have different roles.
Explain without looking
- Why should a calculated cardiac output from a simplified worksheet not be used to judge an individual's health?
- What is plasma?
Further reading and review references
- openstax.org · reference 1
- www.genome.gov · reference 2
- www.genome.gov · reference 3
- www.genome.gov · reference 4
- www.genome.gov · reference 5
- www.genome.gov · reference 6
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.