Lab 7: Circulatory and Lymphatic

Question 1

Name & Characteristics

Answer 1

Artery, vein and nerve

Characteristics - Peripheral arteries, veins, and nerves tend to travel and branch in parallel.

Question 2

Name & Function

Answer 2

Artery, vein and nerve

Function –

All three have different functions towards the human body.

Artery – Supply oxygenated blood

Vein – Collects deoxygenated blood

Nerve - conducts impulses from the brain/spinal cord to receptor organs as well as conducting impulses from the receptor organs back to the brain/spinal cord.

Question 3

Name & Location

Answer 3

Artery, vein and nerve

Location – Human organ system

Question 4

Name & Characteristics

Answer 4

Lymph Node

Characteristics – A lymph node is round, ovoid, or bean-shaped and varies in size from less than 1 mm to 2-3 cm. Lymph nodes may enlarge during infection or disease and then they are easily palpated.

Question 5

Name & Function

Answer 5

Lymph Node

Function - Lymph nodes produce lymphocytes and antibodies, filter the lymph (remove dead bacteria and other foreign bodies), serve as a defense mechanism to prevent the spread of malignant cells, and represent potential hemopoietic organs.

Question 6

Name & Location

Answer 6

Lymph Node

Location - Found along the course of blood vessels, often at the flexor aspects of joints (e.g., inguinal, popliteal, and axillary lymph nodes).

Question 7

Name & Characteristics

Answer 7

Palatine Tonsils

Characteristics – Top layer of the tonsil consists of stratified Squamous epithelium followed by lymphatic tissue.

Question 8

Name & Function

Answer 8

Palatine Tonsils

Function - Helps in local immunity and cytokine action.

Question 9

Name & Location​

Answer 9

Palatine Tonsils

Location - These are the tonsils that can be seen on the left and right sides at the back of the throat.

Question 10

Name & Characteristics

Answer 10

Peyer’s Patches

Characteristics: Diffuse lymphoid tissues (lymphoid nodule) composed of lymphocytes

Question 11

Name & Function

Answer 11

Peyer’s Patches

Function - Immunity by attaching foreign agents

Question 12

Name & Location

Answer 12

Peyer’s Patches

Location - Found along the intestinal wall with higher amounts in the ileum and appendix

Question 13

Name & Characteristics

Answer 13

Thymus

Characteristics - Thymus is a bilobed mass of lymphatic tissue. It reaches its greatest relative weight (10-15 g) at birth and its greatest absolute weight (30-40 g) about the time of puberty. It begins to involute after puberty (weighing about 25 g at 25 years, 13 g at 50 years, and 6 g at 75 years) and may become difficult to recognize grossly because of fatty infiltration. Gonads, suprarenal glands, and the thyroid gland influence the thymus.

Question 14

Name & Function

Answer 14

Thymus

Function- Maturation site for T cells

Question 15

Name & Location

Answer 15

Thymus

Location - Found close to vessels at the base of heart

Question 16

Name & Characteristics

Answer 16

Arterial Walls

Characteristics - elastic tissue is colored blue and consists of adventia, collagen is pale pink and cytoplasm (in smooth muscle and nerve) is red and consists of tunica media and the innermost layer, tunica intima is closest to the lumen

Question 17

Name & Function

Answer 17

Arterial Walls

Function – Protection to arterial walls, help in contraction and relaxation, controls blood pressure

Question 18

Name & Location

Answer 18

Arterial Walls

Location – Human Cardiovascular System