HOSA Veterinary Science Exam 2027: Animal Anatomy, Diseases, Emergency
Care & Instruments Q&A
This specialized competitive preparation guide delivers targeted practice questions and
verified answers custom-tailored to the 2026/2027 HOSA Veterinary Science national
event guidelines. It provides comprehensive coverage of key competitive modules,
including veterinary instrumentation identification, animal anatomy and physiology,
common zoonotic diseases, emergency stabilization math, and recognized small and
large breed classifications. High school and collegiate healthcare students will master
clinical calculation parameters, diagnostic imagery tracking, and technical medical
vocabulary to secure a top-tier placement at regional, state, and international leadership
conferences.
SECTION 1: ANIMAL ANATOMY & PHYSIOLOGY (Questions
1–40)
1. Which term refers to the front of an animal's body?
A) Caudal
B) Cranial
C) Dorsal
D) Ventral
Rationale: Cranial (or anterior) refers to the front or head end of the body.
2. The term "caudal" refers to which direction?
A) Toward the head
B) Toward the tail
C) Toward the belly
D) Toward the back
Rationale: Caudal means toward the tail or rear of the animal.
3. Which plane divides the body into equal left and right halves?
A) Transverse plane
B) Dorsal plane
C) Median (sagittal) plane
D) Frontal plane
,Rationale: The median or midsagittal plane divides the body into equal left and right
halves.
4. How many bones are in the typical canine skeleton?
A) 186
B) *319*
C) 206
D) 425
Rationale: Dogs have approximately 319 bones in their skeleton, varying slightly by breed.
5. Which bone is the longest in the body of most domestic animals?
A) Humerus
B) Tibia
C) Femur
D) Radius
Rationale: The femur (thigh bone) is typically the longest and strongest bone.
6. What is the name of the joint between the upper and lower jaw?
A) Coxofemoral joint
B) Temporomandibular joint
C) Scapulohumeral joint
D) Stifle joint
Rationale: The temporomandibular joint (TMJ) connects the mandible to the temporal
bone of the skull.
7. Which type of muscle is under voluntary control?
A) Cardiac muscle
B) Smooth muscle
C) Skeletal muscle
D) Visceral muscle
Rationale: Skeletal muscle is under voluntary control, while cardiac and smooth muscles
are involuntary.
8. What is the largest organ in the mammalian body?
A) Liver
B) Skin
C) Brain
D) Lungs
Rationale: The skin is the largest organ, providing protection, temperature regulation, and
sensory functions.
,9. Which layer of the skin contains hair follicles and sweat glands?
A) Epidermis
B) Dermis
C) Hypodermis
D) Subcutaneous layer
Rationale: The dermis contains hair follicles, sweat glands, sebaceous glands, and blood
vessels.
10. What is the medical term for the "knee" joint in dogs?
A) Carpus
B) Tarsus
C) Stifle
D) Elbow
Rationale: The stifle is the equivalent of the human knee joint in dogs and cats.
11. Which chamber of the heart pumps blood to the lungs?
A) Left atrium
B) Right ventricle
C) Left ventricle
D) Right atrium
Rationale: The right ventricle pumps deoxygenated blood to the lungs via the pulmonary
artery.
12. What is the normal heart rate for an adult dog at rest?
A) 40–60 bpm
B) 60–160 bpm
C) 180–220 bpm
D) 20–40 bpm
Rationale: Normal canine heart rate ranges from 60–160 beats per minute depending on
size and breed.
13. What is the normal body temperature for a healthy dog?
A) 97–98°F
B) 100.5–102.5°F
C) 103–105°F
D) 95–97°F
Rationale: Normal canine body temperature is approximately 100.5–102.5°F.
14. Which blood vessel carries oxygenated blood from the lungs to the heart?
A) Pulmonary artery
B) Pulmonary vein
, C) Aorta
D) Vena cava
Rationale: The pulmonary vein carries oxygenated blood from the lungs to the left atrium.
15. How many pairs of ribs does a dog typically have?
A) 10
B) *13*
C) 15
D) 8
Rationale: Dogs typically have 13 pairs of ribs.
16. What is the primary function of red blood cells?
A) Fight infection
B) Transport oxygen
C) Clot blood
D) Produce antibodies
Rationale: Red blood cells contain hemoglobin, which transports oxygen throughout the
body.
17. Which organ produces insulin?
A) Liver
B) Pancreas
C) Kidneys
D) Adrenal glands
Rationale: The pancreas produces insulin and glucagon to regulate blood glucose levels.
18. What is the dental formula for an adult dog's upper jaw?
A) 2 incisors, 1 canine, 3 premolars, 2 molars
B) 3 incisors, 1 canine, 4 premolars, 2 molars
C) 3 incisors, 2 canines, 4 premolars, 3 molars
D) 2 incisors, 2 canines, 3 premolars, 2 molars
Rationale: The upper jaw of an adult dog has 3 incisors, 1 canine, 4 premolars, and 2
molars on each side.
19. Which part of the digestive system is responsible for fermenting plant material
in ruminants?
A) Stomach
B) Rumen
C) Small intestine
D) Cecum
Care & Instruments Q&A
This specialized competitive preparation guide delivers targeted practice questions and
verified answers custom-tailored to the 2026/2027 HOSA Veterinary Science national
event guidelines. It provides comprehensive coverage of key competitive modules,
including veterinary instrumentation identification, animal anatomy and physiology,
common zoonotic diseases, emergency stabilization math, and recognized small and
large breed classifications. High school and collegiate healthcare students will master
clinical calculation parameters, diagnostic imagery tracking, and technical medical
vocabulary to secure a top-tier placement at regional, state, and international leadership
conferences.
SECTION 1: ANIMAL ANATOMY & PHYSIOLOGY (Questions
1–40)
1. Which term refers to the front of an animal's body?
A) Caudal
B) Cranial
C) Dorsal
D) Ventral
Rationale: Cranial (or anterior) refers to the front or head end of the body.
2. The term "caudal" refers to which direction?
A) Toward the head
B) Toward the tail
C) Toward the belly
D) Toward the back
Rationale: Caudal means toward the tail or rear of the animal.
3. Which plane divides the body into equal left and right halves?
A) Transverse plane
B) Dorsal plane
C) Median (sagittal) plane
D) Frontal plane
,Rationale: The median or midsagittal plane divides the body into equal left and right
halves.
4. How many bones are in the typical canine skeleton?
A) 186
B) *319*
C) 206
D) 425
Rationale: Dogs have approximately 319 bones in their skeleton, varying slightly by breed.
5. Which bone is the longest in the body of most domestic animals?
A) Humerus
B) Tibia
C) Femur
D) Radius
Rationale: The femur (thigh bone) is typically the longest and strongest bone.
6. What is the name of the joint between the upper and lower jaw?
A) Coxofemoral joint
B) Temporomandibular joint
C) Scapulohumeral joint
D) Stifle joint
Rationale: The temporomandibular joint (TMJ) connects the mandible to the temporal
bone of the skull.
7. Which type of muscle is under voluntary control?
A) Cardiac muscle
B) Smooth muscle
C) Skeletal muscle
D) Visceral muscle
Rationale: Skeletal muscle is under voluntary control, while cardiac and smooth muscles
are involuntary.
8. What is the largest organ in the mammalian body?
A) Liver
B) Skin
C) Brain
D) Lungs
Rationale: The skin is the largest organ, providing protection, temperature regulation, and
sensory functions.
,9. Which layer of the skin contains hair follicles and sweat glands?
A) Epidermis
B) Dermis
C) Hypodermis
D) Subcutaneous layer
Rationale: The dermis contains hair follicles, sweat glands, sebaceous glands, and blood
vessels.
10. What is the medical term for the "knee" joint in dogs?
A) Carpus
B) Tarsus
C) Stifle
D) Elbow
Rationale: The stifle is the equivalent of the human knee joint in dogs and cats.
11. Which chamber of the heart pumps blood to the lungs?
A) Left atrium
B) Right ventricle
C) Left ventricle
D) Right atrium
Rationale: The right ventricle pumps deoxygenated blood to the lungs via the pulmonary
artery.
12. What is the normal heart rate for an adult dog at rest?
A) 40–60 bpm
B) 60–160 bpm
C) 180–220 bpm
D) 20–40 bpm
Rationale: Normal canine heart rate ranges from 60–160 beats per minute depending on
size and breed.
13. What is the normal body temperature for a healthy dog?
A) 97–98°F
B) 100.5–102.5°F
C) 103–105°F
D) 95–97°F
Rationale: Normal canine body temperature is approximately 100.5–102.5°F.
14. Which blood vessel carries oxygenated blood from the lungs to the heart?
A) Pulmonary artery
B) Pulmonary vein
, C) Aorta
D) Vena cava
Rationale: The pulmonary vein carries oxygenated blood from the lungs to the left atrium.
15. How many pairs of ribs does a dog typically have?
A) 10
B) *13*
C) 15
D) 8
Rationale: Dogs typically have 13 pairs of ribs.
16. What is the primary function of red blood cells?
A) Fight infection
B) Transport oxygen
C) Clot blood
D) Produce antibodies
Rationale: Red blood cells contain hemoglobin, which transports oxygen throughout the
body.
17. Which organ produces insulin?
A) Liver
B) Pancreas
C) Kidneys
D) Adrenal glands
Rationale: The pancreas produces insulin and glucagon to regulate blood glucose levels.
18. What is the dental formula for an adult dog's upper jaw?
A) 2 incisors, 1 canine, 3 premolars, 2 molars
B) 3 incisors, 1 canine, 4 premolars, 2 molars
C) 3 incisors, 2 canines, 4 premolars, 3 molars
D) 2 incisors, 2 canines, 3 premolars, 2 molars
Rationale: The upper jaw of an adult dog has 3 incisors, 1 canine, 4 premolars, and 2
molars on each side.
19. Which part of the digestive system is responsible for fermenting plant material
in ruminants?
A) Stomach
B) Rumen
C) Small intestine
D) Cecum
