7th Grade

1
7th Grade Unit 5 The Structure and Function of
Body Systems Lesson 4 Immune, Endocrine, and
Reproductive Systems Vocabulary of Instruction
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Antibody

• Protein in the blood which reacts to infectious
  agents.

3
Bacteria

• One-celled organisms that lack a nucleus and the
  organelles that are associated with eukaryotic
  cells.

4
Ductless Glands

• Are glands 
• that secrete their product directly onto a
  surface rather than through a duct.

5
Hormones

• Chemical messengers that carry a signal from one
  cell (or group of cells) to another.

6
Lymph

• Plasma-like fluid containing white blood cells to
  fight disease.

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Pathogen

• Disease-causing microorganisms such as bacteria
  or viruses.

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Virus

• Is the smallest form of microorganisms capable of
  causing disease.