Lesson 1: Levels of Organization
a living thing; anything that can carry out life processes independently
Organism
____________________ delivers nutrients and oxygen to all cells in the body.
Circulatory System
____________________ breaks down food into essential nutrients and expels solid waste from the body.
Digestive System
What are the two major groups of plants called?
vascular and non-vascular
the maintenance of a constant internal state in a changing environment
homeostasis
a group of similar cells that perform a common function
Tissue
____________________ takes in oxygen and releases carbon dioxide as we breathe.
Respiratory System
____________________ removes liquid wastes from the body.
Excretory System
a plant organ that is the main site of photosynthesis and transpiration
leaf
______________________ is a cycle of events in which information from one step controls or affects a previous step.
feedback
a collection of tissues that carry out a specialized function of the body
Organ
____________________ moves bones, causes the heart to beat, and moves food through the digestive system.
Muscular System
The root system that branching roots grow close to the soil surface and grows out wide to form mats to firmly plant the plant in the soil.
fibrous root system
the mainly underground organ of vascular plants that holds plants in place and absorbs and stores water and minerals from the soil
root
the ability to store and recall past experience
memory
a group of organs that work together to perform body functions
Organ System
____________________ supports the body, protects organs, allows movement, and makes blood cells.
Skeletal System
tiny openings in a plants leaf surface where water, carbon dioxide and oxygen can enter and exit the plant.
stomata
a plant structure that provides support and transports nutrients
stem
environmental messages such as light, heat, and pressure that an organism may respond to.
stimulus
cells, tissues, organs, organ systems, organism
____________________ controls body movements and controls communication between the brain and the environment.
Nervous System
The process that plants use to grow towards light.
The Process that a plant goes through to grow in response to gravitational pull on the plant.
phototropism
Geotropism
The root system that is mainly one large root structure with many smaller branch roots.
taproot
an action that an individual carries out in response to a stimulus or to the environment
behavior