Blog ini berkongsi mengenai pelbagai maklumat berkaitan matapelajaran sains sekolah rendah.
Tuesday 5 September 2017
MIOKARDITIS
PENYAKIT KARDIOVASKULAR
Miokarditis
•Keradangan miokardium(otot jantung)
•Berpunca daripada jangkitan virus,miokarditis idopatik, dan ejen perosak
Seperti alcohol,bahan kimia dan radiasi.
3. Kegagalan
jantung/congestive
heart failure (CHF)
•Jantung gagal membekalkan darah beroksigen yang
mencukupi keseluruh badan
ARTEROSKLEROSIS
Penyakit kardiovaskular
1.Aterosklerosis
•Disebabkan enapan lemak dan kolestrol pada dinding arteri
•Salur darah arteri menjadi sempit dan dinding arteri mengeras dan menjadi kurang kenyal
•Pengaliran darah tersekat dan menyebabkan tekanan darah meningkat
•Berkemungkinan besar boleh menyebabkan hipertension/darah tinggi
•Boleh berlaku di setiap arteri dalam badan seperti arteri koronari,pembuluh darah
MEKANISMA PENGEPAMAN JANTUNG
kita tidak mampu untuk mengawal pergerakan jantung kita kerana mekanisme pergerakan jantung
merupakan proses homeostatic.
FUNGSI JANTUNG MANUSIA
KARDIOVASKULAR
MANUSIA
Fungsi:
1)Mengangkut oksigen dan
nutrient ke setiap sel melalui darah yang
dipam oleh jantung
2)Mengeluarkan karbon dioksida dan sisa
metabolism daripada sel badan
3)Mengangkut
hormone dari kalenjar endokrin ke sel-sel sesaran melalui
plasma darah
4)Membantu mengekalkan suhu badan.
#JANTUNG MANUSIA ADALAH SEBESAR PENUMBUK MANUSIA ITU SENDIRI
DI MANAKAH LETAKNYA JANTUNG KITA?
Menurut Dr Beni Rusani, kardiologist di IJN jantung terletak di tengah dada. bukan di kanan atau di kiri. jadi apabila melakukan CPR ,tekan ditengah.
SISTOL DAN DIASTOL
QUESTIONS:-
- 1.What is the definition of the Cardiac Cycle?
- A.Cardiac Cycle refers to the sequence of events that occur during one complete heartbeat
- B.The contraction of the atria
- C.The contraction and relaxation of the ventricles
- D.The circulation of blood in the heart
- 2.Name the three phases of the Cardiac Cycle in order
- A.Early Diastole, Mid-to-Late Diastole, Ventricular Systole
- B.Ventricular Systole, Mid-to-Late Diastole, Early Diastole
- C.Mid-to-Late Diastole, Ventricular Systole, Early Diastole
- D.Early Diastole, Ventricular Systole, Mid-to-Late Diastole
- 3.During the Mid-to-Late Diastole, the heart is in complete relaxation and the pressure in the heart is low.
- A.True
- B.False
- 4.During the Mid-to-Late Diastole, the ...................valves are closed.
- 5.During the Ventricular Systole, the pressure rapidly increases in the ventricles forcing the .............. valves closed.
- 6.When is the ventricular blood volume higher?
- A.At the beginning of the systole
- B.At the beginning of the diastole
- C.During Mid-to-Late Diastole
- D.None of the above
- 7.Which of the following is NOT true for ventricular systole?
- A.The ventricles contract
- B.The atrioventricular valves close
- C.The semilunar valves open
- D.The ventricles relax
- 8.The semilunar valves close during:
- A.Ventricular systole
- B.Ventricular diastole
- C.Atrial systole
- D.Atrial diastole
- 9.The atrioventricular valves open during:
- A.Ventricular systole
- B.Ventricular diastole
- C.Atrial diastole
- D.Both atrial and ventricular systole
- 10.Atrial contraction accounts for most of the ventricular filling
- A.True
- B.False
- 11.The ventricles begin to fill during ventricular diastole.
- A.True
- B.False
- 12.The two distinct heart sounds during the cardiac cycle :
- A. The first heart beat
- A.
- B. The second heart beat
- B.
- 13.An average heartbeat, or cardiac cycle, lasts approximately:
- A.8.0 seconds
- B.80 seconds
- C.0.80 seconds
- D.0.0008 seconds
- 14.During Early Diastole, the ventricles are relaxed, the ............ valves snap shut to prevent back flow.
- 15.A heartbeat, or cardiac cycle, is one sequence of contraction and relaxation of the heart chambers.
- A.The contraction phase is called diastole while the relaxation phase is called systole
- B.Systole refers to both the contraction and the relaxation phase
- C.The contraction phase is called systole while the relaxation phase is called diastole
- D.Diastole refers to both the contraction and the relaxation phase
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QUESTIONS:- 1. What is the definition of the Cardiac Cycle? A. Cardiac Cycle refers to the sequence of events that occur ...