Understanding Animal and Plant Organs: Functions and Structure
This chapter explores the key organs in animals and plants, focusing on their specific functions and structures. We will discuss four main organs: the skin, lungs, heart, and stomach. The skin, as the largest organ, protects against damage and disease, while aiding in vitamin D absorption. The lungs facilitate breathing, exchanging oxygen and carbon dioxide. The heart acts as a muscular pump to circulate blood throughout the body. Additionally, we will touch upon the digestive system’s organs, including the esophagus, stomach, and intestines, highlighting peristalsis and its role in digestion.
Understanding Animal and Plant Organs: Functions and Structure
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Presentation Transcript
Chapter 2 Organs in Animals and Plants
Organs • A group of tissues that work together to perform a specific function 4 main organs we will be studying • Skin • Lung • Heart • Stomach
Skin • Largest organ in the body • Protects the inner cells from damage • Protects against disease • Insulates • Excretes waste 2 main layers Epidermis Dermis
Epidermis • Outer protective layer • Made up of epithelial cells • Prevents bacteria and viruses from entering the body • Helps absorb the vitamin D from the sun • Vitamin D is essential for bone development
Dermis • Inner layer on the skin • Contains nerves that sense • Pain • Heat • Cold • Send info to the brain • Makes up the following: • Connective • Muscle • nervous
Lungs • Pair of organs involved in breathing • Oxygen in and carbon dioxide out • Half of its mass is BLOOD • Covered in 2 sacs of connective tissue • Capillaries- thin walled blood vessels that connect arteries and veins
Heart • Muscular pump that supplies all blood to the body • About the size of your fist • Beats 3.5 billion in a life • 4 chambers • Right atrium • Left atrium • Right ventricle • Left ventricle
Digestion- page 58 • Esophagus • Stomach • Intestine • Small • Large Peristalsis: contraction and relaxation of the smooth muscles along the esophagus
