Our body holds many secrets. Human body has cells, tissues, organs, and systems all working together. There are 206 bones that make up the human body called “The skeleton”.
Our bodies contain eleven major organ systems. The eleven major organ systems are the reproductive system, the nervous system, the integumentary system, the musculoskeletal system, the circulatory system, the excretory system, Immune system, the urinary system, the endocrine system, the digestive system, and the respiratory system.
1-The reproductive system:
The reproductive system is important for species to continue in humans, plants, and animals. There are many organs and tissues that are involved in producing offspring “children”.
In” humans”: The reproductive system in male includes the prostate, testes, and penis.
In females it includes the fallopian tubes, the uterus, the cervix, the ovaries,and the vagina.The process of pregnancy in a female’s uterus takes about nine months.
The respiratory system is a group of organs and tissues. It is responsible for inhaling and exhaling “breathing’’ and delivers oxygen to the cells in your body.
The respiratory system includes airways, lungs and blood vessels. It has many different parts that work together to help you breathe such as: lungs, mouth, sinuses, throat, and windpipes.
The most important part in our respiratory system.The lungs are two organs that absorb oxygen from the air and pass it into our blood and release carbon dioxide.
Our lungs consist of two parts: left lung and right lung. Our left lung is about 10 percent smaller than our right one. We breathe oxygen and other gases, each organ in our body needs oxygen to live.