A cell is the basic structural and functional unit of all living organisms, acting as the smallest unit of life that can replicate on its own. Every living thing, from single-celled bacteria to complex animals and plants, is made of cells. Cells have three main components: a cell membrane, a nucleus, and cytoplasm. They also contain organelles, which are specialized structures that perform specific functions like creating energy, making proteins, and storing genetic material.
The digestive system breaks down food into smaller pieces so the body can use the energy and nutrients. The process starts in the mouth, where food is chewed and mixed with saliva. From there, it travels down the esophagus (food pipe) to the stomach, a muscular bag that churns food with digestive juices. Next, food moves into the small intestine where it's absorbed into the blood with help from the liver and pancreas. The large intestine absorbs extra water from the remaining waste, which is then eliminated from the body through the anus.
The water cycle is the continuous movement of water on, above, and below the Earth's surface, driven by the sun's energy. Key biological and physical processes include evaporation (liquid to vapor), condensation (vapor to clouds), and precipitation (rain, snow, etc.). Other vital processes are transpiration from plants, runoff and infiltration into the ground, and sublimation (ice to vapor). This cycle is essential for life, constantly recycling water between the atmosphere, land, and oceans.
Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons. This difference in neutrons means they have different atomic masses. While isotopes have nearly identical chemical properties, their different masses can lead to different physical properties.
Good nutrition for kids involves a balanced diet from all five food groups: protein, dairy, grains, fruits, and vegetables, with a focus on whole grains and lean proteins. Key nutrients like vitamins A and C, calcium, iron, and fiber are vital for growth and development, and can be found in a variety of healthy foods like fruits, vegetables, and whole grains. Limiting processed foods, added sugars, and excess salt is also important.
A food pyramid is a visual guide that shows the recommended daily intake of different food groups for a healthy, balanced diet.
A human cell is the basic unit of life, and the human body is made of trillions of them. Each cell has a membrane, a nucleus, and cytoplasm, and performs specialized functions like providing structure, converting food to energy, and storing genetic material. These cells are highly complex, with many internal organelles like mitochondria for energy and ribosomes for making proteins.
The main parts of the body include the head, trunk (or torso), and limbs (arms and legs). The head contains sensory organs like the eyes, ears, nose, and mouth, while the trunk includes the shoulders, chest, back, and abdomen. The limbs are the extremities: the arms with hands and fingers, and the legs with feet and toes.
The skeletal system is the body's support structure, composed of bones, cartilage, ligaments, and other connective tissues. It provides shape, protects organs, facilitates movement, stores minerals, and produces blood cells. An adult human skeleton has 206 bones, which are divided into two main parts: the axial skeleton (skull, vertebral column, and rib cage) and the appendicular skeleton (limbs and girdles).
The digestive system is made up of: the alimentary canal (also called the digestive tract). This long tube of organs makes a pathway for food to travel through the body. It runs from the mouth to the anus (where poop comes out) and includes the esophagus, stomach, and intestines.
i know digestive system is hard and you did a little that's veeeeeeeerrrrrryyyyyyyy goooooooooooodddd
I learnt about parts of Eyes
COOL