Science

Liver

Organ that processes various substances for removal from the body in the excretory system.

Kidneys

Two bean-shaped organs that filter blood to remove urea and create urine.

Urea

A toxic chemical waste product produced by cells, removed by the kidneys.

Deoxygenated Blood

Blood that is high in carbon dioxide and low in oxygen.

Oxygenated Blood

Blood that is rich in oxygen, ready to be pumped to body tissues.

Circulatory System

System responsible for transporting oxygen, nutrients, and waste throughout the body.

Gas Exchange

Process of supplying blood with oxygen and removing carbon dioxide waste.

Diffusion

Movement of molecules from high to low concentration, critical for gas exchange in the lungs.

Alveoli

Tiny air sacs in the lungs where gas exchange occurs.

Cellular Respiration

Process by which cells use glucose and oxygen to create energy.

Mechanical Digestion

Physical breakdown of food into smaller pieces without altering its chemical structure.

Chemical Digestion

Process that uses chemicals to break down food into nutrients.

Metalloids

Elements that have properties between metals and non-metals, also known as semi-metals.

Compound

Substance formed from two or more different types of atoms chemically bonded together.

Mixture

Physical combination of two or more substances that retain their original properties.

Periodic Table

A chart that organizes elements based on their physical and chemical properties.

Epithelial Tissue

Type of tissue that lines the surfaces of organs and structures in the body.

Mitochondria

Cell organelles where cellular respiration occurs, producing energy for the cell.

Hemoglobin

Protein in red blood cells that carries oxygen from the lungs to the rest of the body.

Carbon Dioxide

Waste product of cellular respiration that is expelled from the body through the respiratory system.