Question:

Why do we call our heart myogenic?

Answer:

1. Myogenic refers to the fact that the heart is capable of creating its own electrical impulses, which cause it to beat without any external stimulation.

2. This is known as myogenic activity, and it is the reason why we refer to the heart as myogenic.

Question:

Why do we consider blood as a connective tissue?

Answer:

Answer:

1. We consider blood as a connective tissue because it contains cells and proteins that are suspended in a liquid matrix known as plasma.
2. Blood cells, such as red blood cells and white blood cells, are important for transporting oxygen and other substances throughout the body.
3. The proteins in blood, such as antibodies, help to protect the body from infection and disease.
4. Blood also contains a variety of other components, such as hormones, nutrients, and waste products, which are necessary for the body’s functions.
5. Finally, blood plays an important role in the body’s healing process, as it helps to repair damaged tissues and organs.

Question:

Draw a standard ECG and explain the different segments in it.

Answer:

Step 1: Draw a standard ECG.

Step 2: Explain the different segments in the ECG. The ECG consists of five different segments: P wave, QRS complex, ST segment, T wave, and U wave. The P wave represents the depolarization of the atria. The QRS complex represents the depolarization of the ventricles. The ST segment is the period between the QRS complex and the T wave and represents the period of ventricular repolarization. The T wave represents the repolarization of the ventricles. The U wave is the final wave and is usually small and difficult to detect.

Question:

What is meant by double circulation? What is its significance?

Answer:

Answer:

Double circulation is a type of circulation in which blood passes through both the pulmonary circuit and the systemic circuit. This type of circulation is found in higher vertebrates, including humans. Its significance lies in the fact that it allows for a more efficient delivery of oxygen to the body’s cells and tissues, and a more efficient removal of carbon dioxide and other waste products. Additionally, double circulation is thought to be necessary for the evolution of larger body sizes in higher vertebrates.

Question:

Sino-atrial node is called as the pacemaker of our heart. Why?

Answer:

1. The sino-atrial node (SA node) is a group of specialized cells located in the upper chamber (atrium) of the heart.

2. The SA node is responsible for initiating and regulating the heartbeat by producing electrical impulses.

3. These electrical impulses travel through the heart and cause the heart muscles to contract, which in turn pumps blood throughout the body.

4. Because of its role in initiating and regulating the heartbeat, the SA node is often referred to as the “pacemaker” of the heart.

Question:

What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?

Answer:

Step 1: Understand the terms ‘atrio-ventricular node’ and ‘atrio-ventricular bundle’.

Step 2: Research the roles of the atrio-ventricular node and atrio-ventricular bundle in the functioning of the heart.

Step 3: Analyze the information gathered to determine the significance of the atrio-ventricular node and atrio-ventricular bundle in the functioning of the heart.

Question:

Name the components of the formed elements in the blood and mention one major function of each of them ?

Answer:

1. Red Blood Cells (RBCs): Major function of RBCs is to transport oxygen from the lungs to the tissues throughout the body.

2. White Blood Cells (WBCs): Major function of WBCs is to fight against infections and foreign particles in the body.

3. Platelets: Major function of platelets is to help in clotting of blood and prevent excessive bleeding.

4. Plasma: Major function of plasma is to transport nutrients, hormones, and proteins throughout the body.

Question:

What is the importance of plasma proteins?

Answer:

Step 1: Understand what plasma proteins are.

Step 2: Research the importance of plasma proteins.

Step 3: Summarize the importance of plasma proteins.

Question:

Explain heart sounds.

Answer:

1. Heart sounds are the noises generated by the heart as it beats.

2. The heart makes two basic sounds: “lub” and “dub.” The “lub” sound is produced when the heart’s two upper chambers, the atria, contract. The “dub” sound is produced when the two lower chambers, the ventricles, contract.

3. The “lub-dub” sound is created when the two chambers contract and relax in succession. This sound is amplified and can be heard with a stethoscope.

4. Abnormal heart sounds, such as a “whooshing” sound, may indicate a heart murmur or other cardiac issue. A doctor can diagnose any potential heart issues based on the type of sound heard.

Question:

What is the difference between blood and lymph?

Answer:

Step 1: Understand the meaning of the question.

The question is asking for a comparison of the two substances, blood and lymph.

Step 2: Research the answer.

Blood is a fluid that circulates throughout the body, carrying oxygen and nutrients to the cells and removing waste products. It is composed of red and white blood cells, platelets, and plasma. Lymph is a clear, colorless fluid that carries infection-fighting white blood cells throughout the body. It is composed of lymphocytes, proteins, and fats.

Step 3: Summarize the answer.

The main difference between blood and lymph is that blood is composed of red and white blood cells, platelets, and plasma, while lymph is composed of lymphocytes, proteins, and fats. Additionally, blood carries oxygen and nutrients to the cells and removes waste products, while lymph carries infection-fighting white blood cells throughout the body.

Question:

Describe the evolutionary change in the pattern of heart among the vertebrates.

Answer:

1. First, explain what evolutionary change means. Evolutionary change refers to changes in the genetic makeup of a species over time, usually through natural selection.

2. Next, explain the pattern of heart among the vertebrates. Vertebrates have a four-chambered heart that is divided into two atria and two ventricles. This allows for more efficient oxygenation and circulation of blood throughout the body.

3. Finally, describe the evolutionary change in the pattern of the heart among the vertebrates. Over time, the four-chambered heart has evolved to become more efficient and complex. This has allowed for increased oxygenation and circulation of blood, which has enabled vertebrates to become more successful in their environments.

Question:

When spring came, it was still winter in the garden. What does winter stand for or indicate here? Winter has been presented like a story with its own characters and their activities. Describe the story in your own words.

Answer:

The story of winter in the garden is one of quiet and stillness. The trees are bare and the ground is covered in a blanket of snow. The birds have flown south for the winter and the animals are hibernating. Everything is still and silent, as if the garden is waiting for something to happen. But then, when spring arrives, the garden slowly begins to awaken. The snow melts, the birds return, and the animals emerge from their slumber. The trees begin to bud and the flowers start to bloom, bringing a new life and energy to the garden.

Question:

Define a cardiac cycle and the cardiac output?

Answer:

Answer: A cardiac cycle is the sequence of events that occur as the heart pumps blood throughout the body. It includes the contraction (systole) and relaxation (diastole) of the atria and ventricles. The cardiac output is the amount of blood the heart pumps out during one cardiac cycle. It is typically measured in liters per minute.

Question:

Match the column : List 1EosinophilsRBCAB GroupPlateletsSystole List 2CoagulationUniversal RecipientResist infectionsContraction of heartGas transport

Answer:

Eosinophils - Resist infections RBC - Gas transport AB Group - Universal Recipient Platelets - Coagulation Systole - Contraction of heart

Question:

Write the differences between. (a) Blood and Lymph (b) Open and closed system of circulation (c) Systole and diastole (d) P- wave and T- wave

Answer:

(a) Blood and Lymph: Blood is a red fluid that circulates through the body and carries oxygen and nutrients to the body’s cells, while lymph is a clear, colorless fluid that circulates through the body and carries white blood cells and other materials that help the body fight infection.

(b) Open and closed system of circulation: An open system of circulation is one in which the blood is circulated through the body, but does not return to the heart. A closed system of circulation is one in which the blood is circulated through the body and returns to the heart.

(c) Systole and diastole: Systole is the contraction of the heart muscle that pumps blood out of the heart, while diastole is the relaxation of the heart muscle that allows the heart to fill with blood.

(d) P-wave and T-wave: P-wave is the electrical wave that occurs during the contraction of the atria, while T-wave is the electrical wave that occurs during the contraction of the ventricles.