Regulation of cardiac activity | Body fluids and circulation | Biology | Khan Academy

Let's find out which part of our body can increase or decrease our heart rate. 00:00 Introduction 00:45 The brain 01:16 Sympathetic nervous system 02:20 Parasympathetic nervous system 04:20 Adrenal medulla 06:50 Thyroid gland 07:06 Summary Practice this concept - https://www.khanacademy.org/science/i... Check out more videos and practice exercises on Body fluid and circulation - https://www.khanacademy.org/science/i... To get you fully ready for your exam and help you fall in love with Biology, find the complete bank of exercises and videos for Class 11 Biology here - https://www.khanacademy.org/science/i... Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages. Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy. Subscribe to our YouTube channel -    / khanacademy   As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?ut... Created by Khadijatul Qubra