Levels of Organization
Many of this structure work together to form a tissue.
What are CELLS?
This system includes the lungs, trachea and alveoli which are the site of the exchange of oxygen and carbon dioxide. This system is
What is the RESPIRATORY SYSTEM?
These two organs are where the absorption of nutrients occurs. They are especially long and have special structures called villi, which increase the surface area to maximize absorption.
What is the INTESTINES?
The circulatory system completes this life function for multicellular organisms by carrying nutrients and wastes around the body through the blood vessels. This life function is
What is TRANSPORT?
This is the ONLY life function not necessary for the survival of an individual organism.
What is REPRODUCTION?
For a unicellular organism, these structures carry out all life functions necessary to maintain homeostasis.
What are ORGANELLES?
This system is responsible for removing metabolic wastes from the body, preventing the build up of potentially toxic substances.
What is the EXCRETORY SYSTEM?
This system regulates the body using hormones and receptors. Only the target cells with the appropriate receptors will receive the "message" and respond. This system is
What is the ENDOCRINE SYSTEM?
The kidneys remove urea, lungs remove CO2 and the skin removes excess heat from the body. These are all examples of the removal of metabolic wastes. This life function is called
What is EXCRETION?
The endocrine system uses hormones and receptors to ______________ the body's metabolism.
These structures work together in complex systems to carry out life functions for multicellular organisms. Muscles and the kidneys are examples.
What are ORGANS?
This system includes the esophagus, pancreas and stomach. We use this system for ingestion, digestion (and absorption!) and egestion.
What is the DIGESTIVE SYSTEM?
These TWO systems are sometimes considered one system. Together they provide support and move the body. These systems are
What is the MUSCULAR and SKELETAL, or MUSCULOSKELETAL SYSTEM?
Food is both mechanically (mouth and stomach) and chemically (by enzymes) broken down during this process. Generally, it is the breakdown of larger substances into their building blocks. This life function is
What is DIGESTION?
The nervous system uses the senses to detect stimuli in the external and internal environment of the body and respond appropriately. The brain and spinal cord receive nerve impulses and work together to _____________ the body's response.
These are the most basic unit of BOTH structure and function. Every organism has at least one!
What are CELLS?
This system includes the heart, arteries and veins, and capillaries which is the site of the exchange of nutrients and wastes between the blood and tissues. This system has two common names.
What is the CIRCULATORY or CARDIOVASCULAR SYSTEM?
This human organ has four chambers and pumps blood to the lungs to pick up oxygen, then to the rest of the body.
What is the HEART?
The digestion of food into its building blocks must occur before this process can happen. Our intestines are very long and have a large surface area to maximize this process!
What is ABSORPTION?
The musculoskeletal system allow the HUMAN body to obtain food and seek shelter, among other things. Not all organisms need to do this to maintain homeostasis. The muscular and skeletal systems allow the body to perform...
What is LOCOMOTION?
This structure is made of similar cells which work together. There are many types of this structure, including muscle, connective, etc.
What are TISSUES?
This system uses the brain and nerve impulses to coordinate the body's response(s) to detected stimuli in the internal and external environment of the body. It works with nearly every other system!
What is the NERVOUS SYSTEM?
BONUS! This is the largest organ of the human body and forms a barrier that protects us. It also helps remove waste!
What is the SKIN?
The endocrine system regulates the body by sending signals (hormones) which trigger changes/responses in targeted parts of the body. Regulation relies on "____________ loops"
What is FEEDBACK?
The lungs, an organ of the respiratory system, perform this function, which occurs between the alveoli and the capillaries. This process would happen at the cell membrane for a unicellular organism.