Plant Systems
This part of a plant is responsible for photosynthesis.
leaf
This organ system is responsible for exchanging gases with the environment.
respiratory system
This strong connective tissue provides support and structure to the human body.
bone
This process describes the change in inherited traits of a population over time.
evolution
This type of animal tissue is responsible for generating movement.
muscle tissue
These structures in plants transport water and nutrients throughout the plant.
xylem and phloem
This hormone is produced by the pancreas and regulates blood sugar levels.
insulin
These are the two main components of the skeletal system.
cartilage
These structures are remnants of organs or structures that had a function in an ancestor.
vestigial organs
These are the two main types of muscle tissue found in animals.
skeletal and smooth muscle
This process allows plants to convert light energy into chemical energy.
photosynthesis
These two organs work together to filter blood and remove waste from the body.
kidneys
This bone in the human body is often referred to as the "funny bone."
ulna
This scientist is credited with developing the theory of evolution by natural selection.
Charles Darwin
These structures in animals are responsible for circulating blood throughout the body.
blood vessels
These tiny pores on the surface of leaves regulate gas exchange in plants.
stomata
This system is composed of glands that produce hormones regulating various functions.
endocrine system
This bone in the human body is the longest and strongest.
femur
This term describes the process by which species evolve similar traits independently.
convergent evolution
This organ system is responsible for coordinating movement and transmitting signals.
nervous system
In plants, these structures anchor the plant in the soil and absorb water.
roots
This organ system is responsible for protecting the body from pathogens.
immune system
This condition results in the thinning of bone tissue and loss of bone density.
osteoporosis
This theory suggests that evolution occurs in sudden spurts of change followed by long periods of stability.
punctuated equilibrium
This term describes animals that regulate their body temperature internally.
endotherms