DOC-20220923-WA0024. (1).pptx THIS PPT WILL TELL YOU ABOOUT CELL

mansi82315 14 views 12 slides Sep 01, 2024
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About This Presentation

1. Become comfortable speaking in English. (Friends, colleagues, ...)
2. Practice the different parts of the interview. Build vocabulary and discuss different topics.
3. Familiarise yourself with different grammatical structures – e.g. conditionals, standard introductory phrases like “Well, in m...


Slide Content

Presentation on Heart School teaching Subject: Biological Science Programme: B.Ed. II Year (Academic Session:2023-24) University Roll No. :

Teaching Points: Structure of Heart Heartbeat Functions of heart

1. Structure of Heart Heart is an organ which beats continuously to act as a pump for the transport of blood, which carries other substances with it. Our heart works like a pump non-stop. Let us now learn about the heart. The heart is located in the chest cavity with its lower tip slightly tilted towards the left. Hold your fingers inwards on your palm. That makes your fist, your Heart is roughly the size of your fist. Heart has four chambers.

Types of chambers in human Heart Heart has four chambers Two upper chambers are called the Atria (singular : Atrium) Two lower chambers are called the ventricles. The partition between the chambers helps to avoid mixing up of blood rich in oxygen with the blood rich in carbon dioxide. Types of blood Oxygenated blood is a type of blood that rich in oxygen. Deoxygenated blood is a type of blood that rich in Carbon dioxide.

Activity 1

2.Heartbeat The walls of the chambers of the heart are made up of muscles. These muscles contract and relax rhythmically ( Systole  occurs when the heart contracts to pump blood out, and  diastole  occurs when the heart relaxes after contraction) This rhythmic contraction followed by its relaxation constitute a Heartbeat. Remember that heartbeats continue every Moment of our life. If you place your hand The left side of your chest, you can feel your Heartbeat. The doctors feel that your heartbeats with The help of an instrument called a Stethoscope . stethoscope

Activity 2 Tick ✅ the correct answer : Lower chambers are called ventricles. ( ) Heartbeat means muscles are contract and relax. ( ) Human heart has 3 chambers. ( ) The walls of chambers are made up of muscles. ( )

3. Functions of Heart Left and right sides The left and right sides of the heart work in unison. The atria and ventricles contract and relax in turn, producing a rhythmic heartbeat. Right side The right side of the heart receives deoxygenated blood and sends it to the lungs. Left side The left side of the heart receives blood from the lungs and pumps it to the rest of the body.

Schematic diagram of circulation Left ventricle pumps oxygenated blood to body. Right atrium collects deoxygenated blood from body it pumps blood to right ventricle. Right ventricle pumps deoxygenated blood to lungs through pulmonary artery. Pulmonary veins collects the oxygenated blood from lungs and pumps to left arterium.

Blood vessels There are two types of blood vessels : Arteries:  These are thick-walled blood vessels which carry oxygenated blood from the heart to different organs. Pulmonary arteries are exceptions because they carry deoxygenated blood from the heart to lungs; where oxygenation of blood takes place. Veins:  These are thin-walled blood vessels which carry deoxygenated blood from different organs to the heart. Pulmonary veins are exceptions because they carry oxygenated blood from lungs to the heart.
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