Body Systems
What is the smallest unit of biological organization?
Atom
Which cells produce antibodies?
B cells
What organ pumps blood throughout the body?
Heart
Name the brain’s largest part.
Cerebrum
What female organ houses a developing baby?
Uterus
What biological structure is made of similar cells working together?
Tissue
Where are T cells created?
Thymus
Name the blood vessels that carry blood away from the heart.
Arteries
Which lobe controls decision-making?
Frontal lobe
What is the term for a fertilized egg?
Zygote
Which organ system defends against pathogens?
Immune system
What do antibodies tag for destruction?
Antigens
Which blood vessels allow gas and nutrient exchange?
Capillaries
What structure controls balance and coordination?
Cerebellum
During pregnancy, what connects fetus to mother?
Placenta
What type of immunity is present at birth?
Nonspecific immunity
What particle causes infectious diseases but is nonliving?
Virus
What blood cells carry oxygen?
Red blood cells
What is the male reproductive hormone called?
Testosterone
How many chambers does the heart have?
Four
Name the white blood cells that engulf microbes.
Phagocytes
What substance kills bacteria but not viruses?
Antibiotics
What is the liquid part of blood called?
Plasma
Where do sperm mature?
Epididymis
What system controls rapid information transmission?
Nervous system