Well below I have given you the Registered Dietitian (RD) exam syllabus for the Paper I Human Physiology so you can have a look

Paper I –

Human Physiology

HUMAN PHYSIOLOGY

General principles of Physiology.
The Skeleton - General Account
The Muscular System - General Account -Types of muscles, characteristics of each, Similarities and Differences.
Blood and Circulatory System - Blood and its composition, Functions of each constituent of blood, Blood groups, Blood transfusion and its importance, Coagulation of blood, Blood vessels, Structure and functions of heart, Blood pressure, heart rate, Cardiac output and their regulation.
Lymphatic System - Lymph, Lymph glands and functions, Spleen - Structure and Functions.
Respiratory System - Organs, Structure and Functions, Mechanism of Respiration, Chemical Respiration.
Digestive System - Structure and Functions of Alimentary tract. Functions of various secretions and juices - Saliva, Gastric, Bile, Intestinal, Pancreatic. Functions of enzymes in digestion. Digestion of nutrients - Proteins, Fats, Carbohydrates. Common problems of Digestive tract - Vomiting, Constipation, Diarrhea.
Excretory System - Structure and Functions of (a) Kidney (b) Ureter (c) Bladder (d) Skin. Urine -Formation of urine, Composition of normal and abnormal urine. Role of excretory system in homeostasis, fluid balance, Regulation of body temperature.
Nervous System - Structure of Nerve Cell, Fibre, Classification of Nervous System, Central Nervous System - Brain, Lobes of brain, Cerebrum, Cerebellum, Medulla oblongata, Hypothalamus. Pituitary Gland - structure, Functions, Spinal Cord - structure and functions, Autonomic and Sympathetic nervous system.
Reproductive System - Female reproductive system - organs, structure and functions Male reproductive system - structure and functions, Menstruation, menstrual cycle, Puberty, Menarche, Menopause, Fertilization of ovum, Conception, Implantation.
Sense Organs - Eye - structure and function, Ear - structure and function, Skin -structure and function
Glands and Endocrine System -
Liver - structure and function
Gall Bladder – structure and function
Enterohepatic circulation
Pancreas - structure and function
Endocrine system
Endocrine glands - structure and function. Hormone - types and functions, role in metabolism. Endocrine disorders
Regulation of Hormone Secretion