Vasoconstriction & Vasodilation | Class 11 Biology Chapter 11 | Human Circulatory System | 2025 скачать в хорошем качестве

Vasoconstriction & Vasodilation | Class 11 Biology Chapter 11 | Human Circulatory System | 2025

In this lecture of Class 11 Biology (New Book 2025), we explain the important topic Vasoconstriction and Vasodilation from Chapter 11: Human Circulatory System. This video is specially designed for FSc Part 1 students according to the latest Punjab Board syllabus. You will learn how blood vessels change their diameter, how vasoconstriction reduces blood flow, and how vasodilation increases blood flow to different parts of the body. We also discuss the role of the nervous system, hormones, and chemical signals in controlling these processes. This topic is very important for exams and helps students understand blood pressure regulation, temperature control, and overall circulation. The explanation is simple, conceptual, and exam-oriented so students can easily prepare for board exams and long questions. Keywords: Vasoconstriction, Vasodilation, Class 11 Biology, FSc Part 1 Biology, Human Circulatory System, Chapter 11 Biology, Blood Vessels, Regulation of Blood Flow, Punjab Board Biology 2025, Inter Part 1 Biology, Biology Lecture, Science Teachings On, Cardiovascular System, Biology for Exams, Blood Pressure Control Hashtags: #Class11Biology #FScPart1 #BiologyLecture #HumanCirculatorySystem #Vasoconstriction #Vasodilation #PunjabBoard #InterBiology #Biology2025 #ScienceTeachingsOn #BiologyForStudents #BoardExamPreparation #BiologyClass11